Given an integer array nums and an integer k, return the number of pairs (i, j) where i < j such that |nums – nums| == k. The value …
You are given a list of integers nums, representing the number of chess matches each person has won. Return a relative ranking (0-indexed) of each person. If two players …
Evaluate the value of an arithmetic expression in Reverse Polish Notation. Valid operators are +, -, *, and /. Each operand may be an integer or another expression. Note …
You are given a 0-indexed integer array nums, where nums represents the score of the ith student. You are also given an integer k. Pick the scores of any …
Often, I do the leetcoding at spare time such as watching kids running in soft play or other e.g. family events. Leetcoding is handy as long as you have …
Given a string s, reverse the string according to the following rules: All the characters that are not English letters remain in the same position. All the English letters …