Author: ACMer

The changeover from volume-limited IPv4 to IPv6 launched 6 years ago, and now, according to Internet Society, IPv6 is dominant. 25% of connections to Google services, a bellwether for …

In a town, there are N people labelled from 1 to N. There is a rumor that one of these people is secretly the town judge. If the town …

Given two strings S and T, return if they are equal when both are typed into empty text editors. # means a backspace character. Example 1: Input: S = …

In an alien language, surprisingly they also use english lowercase letters, but possibly in a different order. The order of the alphabet is some permutation of lowercase letters. Given …

Given a 2D integer matrix M representing the gray scale of an image, you need to design a smoother to make the gray scale of each cell becomes the …