Codeforces_aim Tech Round 3 (Div. 1) _a

Http://codeforces.com/problemset/problem/708/A

Greedy, the first successive string of ' a ' exclude, and then know to find the first ' a ', pay attention to special circumstances.

#include <iostream>#include<cstdio>#include<string>using namespacestd;intMain () {strings; CIN>>s; inti;  for(i =0; i < s.size () && s[i] = ='a'; i++); if(i = = S.size ()) s[i-1] ='Z'; Else    {         for(; i < s.size () && s[i]! ='a'; i++) S[i] = s[i]-1; } cout<< s <<Endl; return 0;}

Codeforces_aim Tech Round 3 (Div. 1) _a