Lets Learn To Succeed

Posts

Showing posts from October, 2021

Equal Beauty CodeChef SnackDown 2021 Round 1A

Equal Beauty CodeChef SnackDown 2021 Round 1A Question The beauty of an (non-empty) array of integers is defined as the difference between its largest and smallest element. For example, the beauty of the array [2,3,4,4,6] is 6−2=4. An array A is said to be good if it is possible to partition the elements of A into two non-empty arrays B1 and B2 such that B1 and B2 have the same beauty. Each element of array A should be in exactly one array: either in B1 or in B2. For example, the array [6,2,4,4,4] is good because its elements can be partitioned into two arrays B1=[6,4,4] and B2=[2,4], where both B1 and B2 have the same beauty (6−4=4−2=2). You are given an array A of length N. In one move you can: Select an index i (1≤i≤N) and either increase Ai by 1 or decrease Ai by 1. Find the minimum number of moves required to make the array A good. Input Format The first line of input contains a single integer T, denoting the number of test cases. The description of T test cases follow. Each ...

Round Robin Ranks CodeChef SnackDown 2021 Round 1A

Round Robin Ranks CodeChef SnackDown 2021 Round 1A Question A round-robin tournament is being held in Chefland among N teams numbered 1,2,...,N. Every team play with all other teams exactly once. All games have only two possible results - win or loss. A win yields 2 points to the winning team while a loss yields no points. What is the maximum number of points a team finishing at the Kth position can score? Note: If two teams have the same points then the team with the higher team number achieves the better rank. Input Format First line will contain T, number of testcases. Then the testcases follow. Each testcase contains a single line of input, two space-separated integers N,K. Output Format For each testcase, output in a single line an integer - the maximum points the team ranked K in the round-robin tournament can score. Constraints 1≤T≤10^5 1≤K≤N≤10^9 Sample Input 1 3 3 3 4 1 7 4 Sample Output 1 2 6 8 Explanation Test Case 1: There are 3 teams in the tournament. The...

Min Max LCM CodeChef SnackDown 2021 Round 1A Solution

Min Max LCM CodeChef SnackDown 2021 Round 1A Solution Question You are given two positive integers X and K. You have to output the minimum and maximum value of LCM(i,j) where X≤i<j≤X⋅K. We define LCM(i,j) for two positive integers i and j as the minimum positive integer y such that both i and j divide y without remainder. Input Format First line will contain T, number of testcases. Then the testcases follow. Each testcase contains of a single line of input, two space separated integers X and K. Output Format For each testcase, output two space separated integers - the minimum and maximum possible value respectively of LCM(i,j) where X≤i<j≤X⋅K. Constraints 1≤T≤10^5 1≤X≤10^8 2≤K≤10^8 It is guaranteed that, for each test case, X⋅K≤10^9 Sample Input 1 2 4 3 2 3 Sample Output 1 8 132 4 30 Explanation Test Case 1: We want to find the minimum and maximum value of LCM(i,j) for 4≤i<j≤12. It is easy to verify that the LCM(4,8)=8 is the minimum possible value whereas LCM...

Dance Moves CodeChef SnackDown 2021 Round 1A Solution

Dance Moves CodeChef SnackDown 2021 Round 1A Solution Question This year Chef is participating in a Dancing competition. The dance performance will be done on a linear stage marked with integral positions. Initially, Chef is present at position X and Chef's dance partner is at position Y. Chef can perform two kinds of dance moves. If Chef is currently at position k, Chef can: Moonwalk to position k+2, or Slide to position k−1 Chef wants to find the minimum number of moves required to reach his partner. Can you help him find this number? Input Format First line will contain a single integer T, the number of testcases. Then the description of T testcases follows. Each testcase contains a single line with two space-separated integers X,Y, representing the initial positions of Chef and his dance partner, respectively. Output Format For each testcase, print in a separate line, a single integer, the minimum number of moves required by Chef to reach his dance partner. Constraints 1≤T≤10^...

Reverse Words in a String LeetCode Solution

Reverse Words in a String LeetCode Solution Question Given an input string s , reverse the order of the words . A word is defined as a sequence of non-space characters. The words in s will be separated by at least one space. Return a string of the words in reverse order concatenated by a single space. Note that s may contain leading or trailing spaces or multiple spaces between two words. The returned string should only have a single space separating the words. Do not include any extra spaces. Example 1: Input: s = "the sky is blue" Output: "blue is sky the" Example 2: Input: s = " hello world " Output: "world hello" Explanation: Your reversed string should not contain leading or trailing spaces. Example 3: Input: s = "a good example" Output: "example good a" Explanation: You need to reduce multiple spaces between two words to a single space in the reversed string. Example 4: Input: s = " ...

Next Greater Element I LeetCode Solution

Next Greater Element I LeetCode Solution Question The next greater element of some element x in an array is the first greater element that is to the right of x in the same array. You are given two distinct 0-indexed integer arrays nums1 and nums2 , where nums1 is a subset of nums2 . For each 0 <= i < nums1.length , find the index j such that nums1[i] == nums2[j] and determine the next greater element of nums2[j] in nums2 . If there is no next greater element, then the answer for this query is -1 . Return an array ans of length nums1.length such that ans[i] is the next greater element as described above. Example 1: Input: nums1 = [4,1,2], nums2 = [1,3,4,2] Output: [-1,3,-1] Explanation: The next greater element for each value of nums1 is as f...

Path Sum III LeetCode Solution

Path Sum III LeetCode Solution Question Given the root of a binary tree and an integer targetSum , return the number of paths where the sum of the values along the path equals targetSum . The path does not need to start or end at the root or a leaf, but it must go downwards (i.e., traveling only from parent nodes to child nodes). Example 1: Input: root = [10,5,-3,3,2,null,11,3,-2,null,1], targetSum = 8 Output: 3 Explanation: The paths that sum to 8 are shown. Example 2: Input: root = [5,4,8,11,null,13,4,7,2,null,null,5,1], targetSum = 22 Output: 3 Constraints: The number of nodes in the tree is in the range [0, 1000] . -10 9 <= Node.val <= 10 9 -1000 <= targetSum <= 1000 Explanation This is a good question to test your logical skills. This question is categorized as medium on LeetCode. Lets know how to solve it by the detailed explanation given here. We can do it by recursion only but it is to much time...