Minimum Cost to Hire K Workers
There are N workers. The i-th worker has a quality quality and a minimum wage expectation wage. Now you want to hire exactly K workers to form a paid group.…
K Way Merge
Rearranging Strings K Distance Apart
Given a non-empty string s and an integer k, rearrange the string such that the same characters are at least distance k apart. If no such arrangement is possible, return…
Find K Pairs with Smallest Sum
You are given two integer arrays nums1 and nums2 sorted in non-decreasing order and two integers k and target. Find k pairs (a, b) from the arrays such that a…
Kth Smallest Element in a Sorted Matrix
Given a square matrix matrix, where each row and column is sorted in non-decreasing order, find the kth smallest element in the matrix.
Merge K Sorted Lists
You are given an array of k linked lists, each linked list is sorted in ascending order. Merge all the linked lists into one sorted linked list and return it.