To subscribe to this RSS feed, copy and paste this URL into your RSS reader. When the migration is complete, you will access your Teams at stackoverflowteams.com, and they will no longer appear in the left sidebar on stackoverflow.com. You have to keep track of the pairs that are compared and counted. By combinatorics, we can observe that if frequency of some element is then, it will contribute to the answer. Sort both the parts. Ia percuma untuk mendaftar dan bida pada pekerjaan. Note that a glove can only pair with a same-sized glove and it can only be part of a single pair. The problem statement asks to find out the number of pairs present in an array, which has the pair Ai XOR Aj = 0. The value 1 indicates that the corresponding (x, y) form a valid pair. Approach: In order to find all the possible pairs from the array, we need to traverse the array and select the first element of the pair. Site design / logo 2022 Stack Exchange Inc; user contributions licensed under CC BY-SA. Simple Approach: Sort the given array so that all the equal elements are adjacent to each other. Program to find all pairs on integer array Here, on this page, we will discuss the program to find all pairs whose sum is equal to a given number in Java . apply to documents without the need to be rewritten? Rekisterityminen ja tarjoaminen on ilmaista. A Naive Solution is to make all pairs one by one and check their modulo is equal to k or not. If you like GeeksforGeeks and would like to contribute, you can also write an article using write.geeksforgeeks.org or mail your article to review-team@geeksforgeeks.org. 3 Explanation:- (1,5) (4,2) (6,0) are the pairs whose sum is equal to the target 6 so total 3 pairs are there so output is 3 . Writing code in comment? Time Complexity: O(n* sqrt(max)) where max is the maximum element in the array.Auxiliary Space: O(n). generate link and share the link here. acknowledge that you have read and understood our, Data Structure & Algorithm Classes (Live), Full Stack Development with React & Node JS (Live), Preparation Package for Working Professional, Full Stack Development with React & Node JS(Live), GATE CS Original Papers and Official Keys, ISRO CS Original Papers and Official Keys, ISRO CS Syllabus for Scientist/Engineer Exam, Find all pairs (a, b) in an array such that a % b = k, Find all Pairs possible from the given Array, Find the sum of all possible pairs in an array of N elements, Check if a pair exists with given sum in given array, Find the Number Occurring Odd Number of Times, Largest Sum Contiguous Subarray (Kadanes Algorithm), Maximum Subarray Sum using Divide and Conquer algorithm, Maximum Sum SubArray using Divide and Conquer | Set 2, Sum of maximum of all subarrays | Divide and Conquer, Finding sum of digits of a number until sum becomes single digit, Program for Sum of the digits of a given number, Compute sum of digits in all numbers from 1 to n, Count possible ways to construct buildings, Maximum profit by buying and selling a share at most twice, Maximum profit by buying and selling a share at most k times, Maximum difference between two elements such that larger element appears after the smaller number, Given an array arr[], find the maximum j i such that arr[j] > arr[i], Sliding Window Maximum (Maximum of all subarrays of size K), Sliding Window Maximum (Maximum of all subarrays of size k) using stack in O(n) time, Next Greater Element (NGE) for every element in given Array, Next greater element in same order as input, Write a program to reverse an array or string. generate link and share the link here. generate link and share the link here. Practice Problems, POTD Streak, Weekly Contests & More! How to find an element based on a data-attribute value in jQuery? Please use ide.geeksforgeeks.org, Code. Thanks for contributing an answer to Stack Overflow! Given an array of integers nums and an integer k, return the number of unique k-diff pairs in the array.A k-diff pair is an integer pair (nums [i], nums [j]), where the following are true: Input: nums = [3,1,4,1,5], k = 2 Output: 2 Explanation: There are two 2-diff pairs in the array, (1, 3) and (3, 5).Although we have two 1s in the input, we. Ideally, SO answers to homework questions should help the OP work his or her way through his or her own solution (instead of just being an ooh, ooh, I can do that dumping ground of other peoples solutions, making it no more than a free code-writing service for students). it should return 2 pairs (1,1 and 2,2 with an extra 1 left out) but it returns 4 pairs instead with my code! For example, arr[5] = 1, 1, 1, 2, 2 The problem can be solved in O(nLogn + mLogn) time. Below is the implementation of the above approach: Time Complexity: O(nLogn + mLogn), where m and n are the sizes of arrays X[] and Y[] respectively. Etsi tit, jotka liittyvt hakusanaan Find a pair of elements from an array whose product equals a given number tai palkkaa maailman suurimmalta makkinapaikalta, jossa on yli 22 miljoonaa tyt. 1 2 3 *; class findPairs { public static v. In finding the number of unique pairs, we count all unique pairs in a given array, i.e., all possible pairs can be formed where each pair should be unique. Let the number of unique elements be x. Please use ide.geeksforgeeks.org, Each pair should have its first element from arr1 and second from arr2. Examples: Input: arr[] = {1, 1, 2}Output: 4(1, 1), (1, 2), (2, 1), (2, 2) are the only possible pairs. 0 ^ Y < Y ^ 0, hence the count for this case is 0. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. A-143, 9th Floor, Sovereign Corporate Tower, We use cookies to ensure you have the best browsing experience on our website. Det er gratis at tilmelde sig og byde p jobs. I believe I was misdiagnosed with ADHD when I was a small child. Your task is to return the list of all pairs of elements such that each sum of elements of each pair equals 'S'. Compare this selector with the Attribute Contains Word selector (e.g. All the numbers from that value to the number right before y would satisfy the conditions. Below is the implementation of the above approach: C++ Java Call pairs over the length of the filtered array of step 2. Given an array with distinct elements, the task is to find the pairs in the array such that a % b = k, where k is a given integer. It will be 3 * 2 / 2 = 3. This code below works perfectly when there is a single pair of numbers. This solution has been condensed to the simplest terms. How do I determine the size of my array in C? Else the current element doesnt make a valid pair with any other element and hence only skips the current element. There can be 13 such pairs in the array. So what I am trying to do is make a code to find pair of numbers in an array. The trick to solving this problem is based on the fact that, for a pair (X, Y), if Y > X, then X ^ Y > Y ^ X. Find centralized, trusted content and collaborate around the technologies you use most. Sg efter jobs der relaterer sig til Find a pair of elements from an array whose sum equals a given number in java, eller anst p verdens strste freelance-markedsplads med 22m+ jobs. To solve this, we will follow these steps First Approach : Sorting. Please write comments if you find anything incorrect, or you want to share more information about the topic discussed above. Hopefully this solution gives just another tool in the box to reason about future problems. If you are just looking for the number of un-ordered pair and the array is sorted in ascending order. Find Sum of all unique sub-array sum for a given array. The count for each y like that is just the differences in indices between y and the first potential x. Then, we iterate the array to count the number of pairs. If x = 1, then the count of pairs for this x is equal to count of 0s in Y[]. Let the number of unique elements be x. Why don't you put the values directly into a counting linked hash map? For our demonstrations, we'll look for all pairs of numbers whose sum is equal to 6, using the following input array: Here if we look at the two pairs; 15 in base 10 (decimal) is the same as 17 in base 8 (octal). Here you are comparing each element one by one with every other element that's why you are getting your answer as 4. The sort step takes O(nLogn) time. Add files via upload. Auxiliary Space: O(1), https://www.youtube.com/watch?v=chYKJGPNEvg. Take two indexes and initialize with the first and last index of an array. To find the closest pair from two sorted array, the Java code is as follows . In total, there are 26 pairs. If equals to k, then print that pair. So here is the example for the problem Input : arr [ ] = { 1, 2, 3, 5, 7, 9 } Output : 6 From the given array, prime pairs are (2, 3), (2, 5), (2, 7), (3, 5), (3, 7), (5, 7) Input : arr [] = {1, 4, 5, 9, 11} Output : 1 Fighting to balance identity and anonymity on the web(3) (Ep. For example If the input array is const arr = [1, 5, 2, 1, 6, 2, 2, 9]; Then the output should be const output = 2; because the desired pairs are 1, 1 and 2, 2 Example The code for this will be Live Demo 2. Given two arrays X [] and Y [] of positive integers, find a number of pairs such that x^y > y^x where x is an element from X [] and y is an element from Y []. Below is the implementation of the above approach: Time Complexity: Time complexity of the above implementation is O(n2 Log n). Connect and share knowledge within a single location that is structured and easy to search. Do I get any security benefits by natting a a network that's already behind a firewall? For all such arr[i], we have k % arr[i] = k. For all elements greater than or equal to k, we use the following fact. Find number of reverse pairs in an array sorted in two parts. Input: nums = [8, 7, 2, 5, 3, 1] target = 10 Output: Pair found (8, 2) or Pair found (7, 3) Input: nums = [5, 2, 6, 8, 1, 9] target = 12 Output: Pair not found If X = 1, then total pairs is equal to the number of 0's in the array B[]. Making statements based on opinion; back them up with references or personal experience. Why was video, audio and picture compression the poorest when storage space was the costliest? Writing code in comment? Thanks, I have made the changes, now the code should work fine. (The same thing happens with the other solutions too, which is why we dont count the input.). This article is contributed by Aarti_Rathi and Shubham Mittal. 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Then, apply the two-pointer algorithm and calculate the multiplicity of each resulting pair directly. Pair with given sum in sorted array gfg sorted pair sum Find the number of pairs in sorted array whose sum is x find a pair of array in given sum find the pair of number which has the given sum in a sorted array Given two unsorted arrays, find all pairs whose sum is x Find all the pairs of two integers in an unsorted array that sum up to a given S. For example, if the array is [3, 5, 2, -4, 8 . To solve this, we will follow these steps . Here, the result could be a pair of zero and three with multiplicity one, and a pair of one and two with multiplicity 25. The task of our function is to pick (num) pairs of Integers. Input: X[] = {2, 1, 6}, Y = {1, 5}Output: 3Explanation: There are total 3 pairs where pow(x, y) is greater than pow(y, x) Pairs are (2, 1), (2, 5) and (6, 1), Input: X[] = {10, 19, 18}, Y[] = {11, 15, 9}Output: 2Explanation: There are total 2 pairs where pow(x, y) is greaterthan pow(y, x) Pairs are (10, 11) and (10, 15). Given an array of N elements, the task is to find all the unique pairs that can be formed using the elements of a given array. For each y, we can quickly binary search for the closest value of y/2. of course: 1,1,1, makes 3 pairs. Find a pair with the given sum in an array Given an unsorted integer array, find a pair with the given sum in it. Given two arrays X[] and Y[] of positive integers, find a number of pairs such that x^y > y^x where x is an element from X[] and y is an element from Y[]. Algorithm to Find Pair of Elements in an Array whose Sum is Equal to a given number 1. arr_len := size of input_arr. The problem statement is an unsorted integer array is given to us and we need to find a pair with the given sum in this array. Needs to sort the array before processing. There can be a total of n (n - 1)/2 number of total pairs from the given array of numbers. The problem "Find number of pairs in an array such that their XOR is 0" state that supposes, we have given an array of integers. Simple Approach: Sort the given array so that all the equal elements are adjacent to each other. For example Input : array [ ] = { 5, 5, 9 } Output : 4 Explanation : The number of all unique pairs are (5, 5), (5, 9), (9, 5) and (9, 9). input from command-line arguments (very, very convenient for testing/playing): input from a single line of text, which we then parse: Asking for help, clarification, or responding to other answers. I suggest you to sort the array first and then simply check the adjacent numbers. Here a pair of indices (i, j) is said to be nice when they satisfy all of these conditions: 1. Explanation: (arr [1], arr [4]) and (arr [2], arr [5]) are the only possible pairs. here a solution which returns all possible pairs: class summands (object): def elements (self, somelist, target): pair = [ (i, target-i) for i in somelist if (target - i) in somelist and i < (target-i)] return [ (somelist.index (pair [i] [0]) + 1, somelist.index (pair [i] [1]) + 1) for i in range (len (pair))] somelist = [10,20,30,40,50] To learn more, see our tips on writing great answers. Practice Problems, POTD Streak, Weekly Contests & More! Then every element of X[] is searched in Y[] using binary search. Here, Firstly the no of times each element has occurred will be calculated and if the number of occurrences is greater than two than the element will form a pair otherwise not. Run a loop and check the condition first < last. (This step is important, make sure you find the reverse pairs first before you sort them because sorting will change the order). 1. You are given an integer array 'ARR' of size 'N' and an integer 'S'. Which is best combination for my 34T chainring, a 11-42t or 11-51t cassette, Book or short story about a character who is kept alive as a disembodied brain encased in a mechanical device after an accident. If k itself is present in arr[], then k forms a pair with all elements arr[i] where k < arr[i]. Input: arr [] = {1, 2, 3, 1, 2} Output: 2. Cari pekerjaan yang berkaitan dengan Find a pair of elements from an array whose sum equals a given number in java atau upah di pasaran bebas terbesar di dunia dengan pekerjaan 22 m +. Stack Overflow for Teams is moving to its own domain! Find the number of pairs in the array whose sum is equal to a given target:- The objective of the code is to Find the number of pairs in the array whose sum is equal to a given target. Writing code in comment? Below are the sample input and output. Method-1: Java Program to Find All Pairs of Elements in an Array Whose Sum is Equal to a Specified Number By Using Brute force approach and Static Input Approach: In this method we will use two nested loops, one for traversing the array and another to check if there's another number in the array which can be added to get the sum. This is much more easily done than people realize: Both of these input solutions are easily combined into the same program: Anyway, this solution is totally over-the-top for an introductory assignment, even with the pared-down global histogram object reducing lines of code. We have two arrays A1 [0..m-1] and A2 [0..n-1], and another value x. This is because each unique element can form a pair with every other unique element including itself. By using our site, you To find all pairs in linear time, run-length encode the array first. Input: arr[] = {6, 5, 2, 3, 5, 2, 2, 1}Output: 2Explanation: (arr[1], arr[4]) and (arr[2], arr[5]) are the only possible pairs. This program runs only on java 1.5 import java.util. Then, the number of unique pairs would be x2. The way OP has it is n^2, if you sort array, you are n log (n) + n for going through array which boils down to n log (n). 1 2 first = 0; last = arr_size -1; 2. A-143, 9th Floor, Sovereign Corporate Tower, We use cookies to ensure you have the best browsing experience on our website. Below is the implementation of above approach : Not the answer you're looking for? Complete Interview Preparation- Self Paced Course, Data Structures & Algorithms- Self Paced Course. By using our site, you 1 commit. In the following implementation, we pre-process the Y array and count 0, 1, 2, 3 and 4 in it, so that we can handle all exceptions in constant time. Time Complexity : O(n2)Auxiliary Space: O(1). Time Complexity: O(n)Auxiliary Space: O(n). Our function should find out the number of pairs of identical integers we can extract out of the array. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. How can I test for impurities in my steel wool? Given a binary search tree, find a pair with a . Suppose your array has n elements, for example 3 in your case. The variable num_inputs specify the number of inputs, and the array input_arr lists the number pairs. Go to file. An Efficient solution is based on below observations : To quickly check if an element is present in the array, we use hashing. Check if array can be sorted by swapping pairs with GCD of set bits count equal to that of the smallest array element, Count of pairs having each element equal to index of the other from an Array, Count pairs of equal elements possible by excluding each array element once, Count pairs from an array having GCD equal to the minimum element in the pair, Maximum count of pairs such that element at each index i is included in i pairs, Count new pairs of strings that can be obtained by swapping first characters of pairs of strings from given array, Check if array can be sorted by swapping pairs having GCD equal to the smallest element in the array, Rearrange array to make it non-decreasing by swapping pairs having GCD equal to minimum array element, Count pairs from given array with Bitwise OR equal to K, Count of pairs in given Array with product of their values equal to sum of their indices (arr[i]*arr[j] = i+j), Count pairs in given Array having sum of index and value at that index equal, Count of replacements required to make the sum of all Pairs of given type from the Array equal, Remaining array element after repeated removal of last element and subtraction of each element from next adjacent element, Count of distinct possible pairs such that the element from A is greater than the element from B, Count of pairs from arrays A and B such that element in A is greater than element in B at that index, Count of pairs {X, Y} from an array such that sum of count of set bits in X Y and twice the count of set bits in X & Y is M, Count unequal element pairs from the given Array, Count all distinct pairs of repeating elements from the array for every array element, Maximize count of pairs (i, j) from two arrays having element from first array not exceeding that from second array, Make all array elements equal by repeatedly replacing largest array element with the second smallest element, Count of equal value pairs from given two Arrays such that a[i] equals b[j], Maximum Count of pairs having equal Sum based on the given conditions, Count pairs from two sorted arrays whose sum is equal to a given value x, Count pairs from two linked lists whose sum is equal to a given value, Complete Interview Preparation- Self Paced Course, Data Structures & Algorithms- Self Paced Course. Recommended: Please try your approach on {IDE} first, before moving on to the solution. A-143, 9th Floor, Sovereign Corporate Tower, We use cookies to ensure you have the best browsing experience on our website. generate link and share the link here. Here is the modified code : And this will also reduce the time complexity of the code. In this algorithm, we will use the nested loop and check for every pair sum present in the array. I very much prefer input that doesnt require the user to know how many items he or she intends to provide: just type them and press Enter. Examples : Input : arr [] = {2, 3, 5, 4, 7} k = 3 Output : (7, 4), (3, 4), (3, 5), (3, 7) 7 % 4 = 3 3 % 4 = 3 3 % 5 = 3 3 % 7 = 3 Recommended Practice Mr Modulo and Pairs Try It! Why did this pop up in my feed if it is so old? Count the number of elements equal to it in the array. Efficient Approach1) Create an empty hash table (unordered_map in C++, HashMap in Java, Dictionary in Python)2) Store frequencies of all elements. C++ C++ code:- #include<bits/stdc++.h> This article is contributed by Aarti_Rathi and Sahil Chhabra. I saw this question and wanted to play with it, especially as @Neil and I are on the same wavelength. Solve Challenge. I want to make it so that it works when there are 3 same elements. Time Complexity: O(N)Auxiliary Space: O(N). We have to find the pair A1[i] + A2[j] such that absolute value of (A1[i] + A2[j] - x) is minimum. And the pair has an element from each array. x smaller than y means x^y is greater than y^x. Although we have two 1s in the input, we should only return the number of unique pairs. Please use ide.geeksforgeeks.org, Then, the number of unique pairs would be x2. How can I find out when was a certain number input? This is because each unique element can form a pair with every other unique element including itself. C, Application behaves differently on different machines, Error in User defined size for array in c. Can FOSS software licenses (e.g. See your article appearing on the GeeksforGeeks main page and help other Geeks. In particular: This solution does have its drawbacks though: I dont know if the input must be { n, a1, , an }, which is very common in academia, at least, but it annoys me. Share Improve this answer Follow edited Jan 23, 2019 at 0:35 Following diagram shows all exceptions in tabular form. Repeat steps 2--5 from the next element that is . Note: Each pair should be sorted i.e the first value should be less than or equals to the second value. The array NoOfY[] is used to store the counts. By using our site, you This code below works perfectly when there is a single pair of numbers. This program would work only for the above mentioned output.It would give wrong output if the array is. There are a few exceptions, for which this condition fails. Find reverse pairs in both parts, add them to result and then merge both the parts. Here goes my version .. implemented in Java. Following are exceptions for x from X[] and y from Y[], Note that the case where x = 4 and y = 2 is not there. 3) Traverse through the hash table. JSON ( JavaScript Object Notation, pronounced / desn /; also / desn /) is an open standard file format and data interchange format that uses human-readable text to store and transmit data objects consisting of attribute-value pairs and arrays (or other serializable values). How does DNS work when it comes to addresses after slash? So what I am trying to do is make a code to find pair of numbers in an array. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. #include <stdio.h> main () { int arr [10], i, j, pairs = 0; int n; scanf ("%d", &n); for (i = 0; i < n; i++) { scanf ("%d", &arr [i]); } for (i = 0; i < n; i++) { for (j = i + 1; j < n; j++) { if (arr [i] == arr [j]) { pairs++; } } } printf ("%d", pairs); } We'll iterate through an array of integers, finding all pairs ( i and j) that sum up to the given number ( sum) using a brute-force, nested-loop approach. So. Steps: Divide the array into 2 parts. Practice Problems, POTD Streak, Weekly Contests & More! That API gives you a DOMStringMap, and you can retrieve the list of data-* attributes simply doing: you can also retrieve a array with the data- property's key names like. Previously the time complexity was O(n2) but now it will also become O(n). The trick here is if y > x then x^y > y^x with some exceptions. 504), Hashgraph: The sustainable alternative to blockchain, Mobile app infrastructure being decommissioned. We have to find number nice pairs of indices present in the array, if the answer is too large, then return answer mod 10^9+7. A-143, 9th Floor, Sovereign Corporate Tower, We use cookies to ensure you have the best browsing experience on our website. 1,x,1, then 1,1,x, then x,1,1 with your algorithm since you're not eliminating when counted. Efficient approach: First find out the number of unique elements in an array. Find a pair with the given sum in an array using Brute Force Time complexity O(N 2 ) Space complexity O(1) Brute force is a straightforward technique we can use to find all the pairs present in the array for a given sum. To find a first pair from a number array whose sum is zero.html. e416486 1 hour ago. Take the first element of the array. Increment the result by frequency/2 for every element. acknowledge that you have read and understood our, Data Structure & Algorithm Classes (Live), Full Stack Development with React & Node JS (Live), Preparation Package for Working Professional, Full Stack Development with React & Node JS(Live), GATE CS Original Papers and Official Keys, ISRO CS Original Papers and Official Keys, ISRO CS Syllabus for Scientist/Engineer Exam, Count all distinct pairs with difference equal to k, Find the maximum element in an array which is first increasing and then decreasing, Check if a pair exists with given sum in given array, Find the Number Occurring Odd Number of Times, Largest Sum Contiguous Subarray (Kadanes Algorithm), Maximum Subarray Sum using Divide and Conquer algorithm, Maximum Sum SubArray using Divide and Conquer | Set 2, Sum of maximum of all subarrays | Divide and Conquer, Finding sum of digits of a number until sum becomes single digit, Program for Sum of the digits of a given number, Compute sum of digits in all numbers from 1 to n, Count possible ways to construct buildings, Maximum profit by buying and selling a share at most twice, Maximum profit by buying and selling a share at most k times, Maximum difference between two elements such that larger element appears after the smaller number, Given an array arr[], find the maximum j i such that arr[j] > arr[i], Sliding Window Maximum (Maximum of all subarrays of size K), Sliding Window Maximum (Maximum of all subarrays of size k) using stack in O(n) time, Next Greater Element (NGE) for every element in given Array, Next greater element in same order as input, Write a program to reverse an array or string, unordered_set with user defined hash function. How to efficiently find all element combination including a certain element in the list. For every element, find its frequency. XOR = 0 is only satisfied when . 1 branch 0 tags. Auxiliary Space: O (n) Efficient approach: First find out the number of unique elements in an array. Suyog8383 Add files via upload. Now, traverse the array and for every element, if it is equal to the element next to it then it is a valid pair and skips these two elements. Following are simple steps based on this trick. Note: 1 is less than or equal to i, i is less than j and j is less than or equal to n (1<= i < j <=n). So that we can start from both the ends. Below is the implementation of the above approach: Time Complexity: O(N*log(N))Auxiliary Space: O(1). Given an array of pairs, find all symmetric pairs in it, Find N - 1 pairs from given array such that GCD of all pair-sums is greater than 1, Maximize count of pairs whose Bitwise AND exceeds Bitwise XOR by replacing such pairs with their Bitwise AND, Maximize count of pairs whose bitwise XOR is even by replacing such pairs with their Bitwise XOR, Maximum count of pairs such that element at each index i is included in i pairs, Minimize sum of absolute difference between all pairs of array elements by decrementing and incrementing pairs by 1, Find N-1 pairs (X, Y) from given array such that X and Y are different and X modulo Y is not present in array, Find the maximum cost of an array of pairs choosing at most K pairs, Find indices of K largest pairs in decreasing order of product from given Array of Pairs, Minimum decrements required such that sum of all adjacent pairs in an Array does not exceed K, Split array into minimum number of subsets such that elements of all pairs are present in different subsets at least once, Find number of pairs (x, y) in an Array such that x^y > y^x | Set 2, Find number of pairs in an array such that their XOR is 0, Probability of obtaining pairs from two arrays such that element from the first array is smaller than that of the second array, Find all unique pairs of maximum and second maximum elements over all sub-arrays in O(NlogN), Count new pairs of strings that can be obtained by swapping first characters of pairs of strings from given array, Check if an array of pairs can be sorted by swapping pairs with different first elements, Minimum subarray reversals required such that sum of all pairs of adjacent elements is odd, Check if there exists a pair (a, b) such that for all the N pairs either of the element should be equal to either a or b, Find K such that changing all elements of the Array greater than K to K will make array sum N, Find the number of pairs (a, b) such that a % b = K, Find the number of pairs such that their gcd is equals to 1, Find any two pairs (a, b) and (c, d) such that a d, Find pairs with given sum such that elements of pair are in different rows, Complete Interview Preparation- Self Paced Course, Data Structures & Algorithms- Self Paced Course.
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