import java.security.MessageDigest; public class SignatureSHA { public static String signSHA(String sha,Object ...arguments){ try{ StringBuffer stringSignTemp = new StringBuffer(); for (int i = 0; i < arguments.length; i++) { stringSignTemp.append(ar…
Lonely Pixel I 两种算法之间的性能比较 今天参加LeetCode Weekly Contest 22,第二题 "Lonely Pixel I" 问题描述如下: Given a picture consisting of black and white pixels, find the number of black lonely pixels. The picture is represented by a 2D char array consisting of 'B'…