题目来源https://leetcode.com/problems/trapping-rain-water/Givennnon-negative integers representing an elevation map where the width of each bar is 1, comp... Read More
题目来源https://leetcode.com/problems/first-missing-positive/Given an unsorted integer array, find the first missing positive integer.For example,Given[1,... Read More
题目来源https://leetcode.com/problems/sudoku-solver/Write a program to solve a Sudoku puzzle by filling the empty cells.Empty cells are indicated by the c... Read More