Submission

Score: 100

User: Karatat007

Problemset: ตัวอักษรตัวแรกในคำ

Language: cpp

Time: 0.003 second

Submitted On: 2026-10-03 09:37:15

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

int arr[26];
int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);

    string s;
    cin >> s;
    for(char c : s) ++arr[c - 'A'];
    for(int i = 0;i < 26;++i){    
    if(arr[i] == 1){
            cout << char(i + 'A');
            break;
        }
    }
}