摘要：
1050. String Subtraction (20)时间限制10 ms内存限制32000 kB代码长度限制16000 B判题程序StandardGiven two strings S1 and S2, S = S1 - S2 is defined to be the remaining string after taking all the characters in S2 from S1. Your task is simply to calculate S1 - S2 for any given strings. However, it might not be that simpl 阅读全文
