Suppose we have two strings s and t of same length. Consider an operation where we choose two indices in a string (not necessarily different) and swap the characters at the selected indices. We have to check whether it is possible to make both strings same by performing at most ... Read More

Suppose we have an alphanumeric string s, we have to find the second largest numerical digit that appears in s, if there is no such string then return -1.So, if the input is like s = "p84t3ho1n", then the output will be 4 as the digits are [1, 3, 4, ... Read More

Suppose we have an array of positive values called nums, we have to find the maximum possible sum of an ascending subarray in nums. We can say a subarray [nums_l, nums_l+1, ..., nums_r-1, nums_r] is ascending when for all i where l nums[i-1], thentotal := total + nums[i]otherwise, total:= ... Read More

Suppose we have a lowercase alphanumeric string s. We shave to replace every non-digit character with a space, but now we are left with some integers that are separated by at least one space. We have to find the number of different integers after performing the replacement operations on s. ... Read More

Suppose we have a chessboard coordinate, that is a string that represents the coordinates of row and column of the chessboard. Below is a chessboard for your reference.We have to check whether given cell is white or not, if white return true, otherwise return false.So, if the input is like ... Read More

Suppose we have sentence s where some English words are present, that are separated by a single space with no leading or trailing spaces. We also have another value k. We have to find only the first k words after truncating.So, if the input is like s = "Coding challenges ... Read More

Suppose we have an array called nums. We have to find sign of the multiplication result of all elements present in the array.So, if the input is like nums = [-2, 3, 6, -9, 2, -4], then the output will be Negative, as the multiplication result is -2592To solve this, ... Read More

Suppose we have an array nums. In one operation, we can select one element of the array and increase it by 1. For example, if we have [4, 5, 6], we can select element at index 1 to make the array [4, 5, 5]. Then we have to find the ... Read More

Suppose we have a number n in decimal number system (base 10) have another value k, we have to find the sum of the digits of n after converting given number n from base 10 to base k. When we calculate digit sum, we will consider each digit as decimal ... Read More

Suppose we have an array nums of positive lengths, we have to find the largest perimeter of a triangle, by taking three values from that array. When it is impossible to form any triangle of non-zero area, then return 0.So, if the input is like [8, 3, 6, 4, 2, ... Read More