Codeforces_AIM Tech Round 3 (Div. 1)_A

Posted 2020-08-08 冷暖知不知

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

 

贪心，先把前面连续的一串‘a‘排除，再向后知道找到第一个‘a‘，注意特殊情况。

 

#include<iostream>
#include<cstdio>
#include<string>
using namespace std;

int main()
{
    string s;
    cin >> s;
    int i;
    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;
}