leetcode
leetcode copied to clipboard
grandyang
Provide all my solutions and explanations in Chinese for all the Leetcode coding problems.
Given the following details of a matrix with `n` columns and `2` rows : * The matrix is a binary matrix, which means each element in the matrix can be ...
There is an `m x n` matrix that is initialized to all `0`'s. There is also a 2D array `indices` where each `indices[i] = [ri, ci]` represents a 0-indexed location ...
Given an array `nums` of positive integers. Your task is to select some subset of `nums`, multiply each element by an integer and add all these numbers. The array is...
Given a string s of `'('` , `')'` and lowercase English characters. Your task is to remove the minimum number of parentheses ( `'('` or `')'`, in any positions )...
Given an array of integers `nums` and an integer `k`. A continuous subarray is called nice if there are `k` odd numbers on it. Return _the number of nice sub-arrays_....
You are given two strings `s1` and `s2` of equal length consisting of letters `"x"` and `"y"` only. Your task is to make these two strings equal to each other....
Given a rectangle of size `n` x `m`, return _the minimum number of integer-sided squares that tile the rectangle_. Example 1:  Input: n = 2, m = 3 Output:...
You are given an array of strings `arr`. A string `s` is formed by the concatenation of a subsequence of `arr` that has unique characters. Return _the maximum possible length_ ...
Given 2 integers `n` and `start`. Your task is return any permutation `p` of `(0,1,2.....,2^n -1) `such that : * `p[0] = start` * `p[i]` and `p[i+1]` differ by only...
Given a callable function `f(x, y)` with a hidden formula and a value `z`, reverse engineer the formula and return *all positive integer pairs _`x`_ and _`y`_ where *`f(x,y) ==...