Educational Codeforces Round 54 (Rated for Div. 2) A. Minimizing the String(思维)

#include <bits/stdc++.h>
using namespace std;
int main()
{
  string str;
  int n;
  cin>>n;
  cin>>str;
  bool flag = 0;
  int len = str.length();
  for(int i=1;i<len;i++){
    if(str[i] < str[i-1]){
      for(int j=0;j<i-1;j++){
        cout<<str[j];
      }
      for(int j=i;j<len;j++){
        cout<<str[j];
      }
      flag = 1;
      break;
    }
  }
  if(flag == 0){
    for(int i=0;i<len-1;i++){
      cout<<str[i];
    }
  }
      puts("");
  return 0;
}