Submission #3326980

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Source Code Expand

#include <bits/stdc++.h>
#include<iostream>
using namespace std;

int main(){
  string s;
  cin >> s;
  if(s=="a"){
   cout << "-1" << endl; 
    return 0;
  }else if(s.size()==1){
    string as = "abcdefghijklmnopqrstuvwxyz";
    int pos = as.find(s);
    cout << as[pos-1] << endl;
  }else{
   cout << s.substr(0,s.size()-1);
  }
}

Submission Info

Judge Result