Submission

Status:

P-PP-PPP-P

Score: 70

User: Nightingale

Problemset: ตัวอักษรตัวแรกในคำ

Language: cpp

Time: 0.002 second

Submitted On: 2025-03-31 20:38:34

#include <bits/stdc++.h>
using namespace std;
int main() 
{
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  string a;
  cin >> a;
  vector<char> keep;
  for(int i=0;i<a.size();i++){
    keep.push_back(a[i]);
  }
  for(int i=0;i<a.size();i++){
    if(count(keep.begin(),keep.end(),a[i])>1){
      remove(keep.begin(),keep.end(),a[i]);
    }
  }
  sort(keep.begin(),keep.end());
  cout << keep[0];
}