Submission

Score: 80

User: mik

Problemset: ตัวอักษรตัวแรกในคำ

Language: cpp

Time: 0.003 second

Submitted On: 2026-10-10 21:44:52

#include <bits/stdc++.h>

using namespace std;

int main(){
    ios_base::sync_with_stdio(false),cin.tie(NULL);
    string s;
    cin >> s;
    int a[26] = {0};
    for (int i=0;i<s.size();i++){
        a[s[i]-'A']++;
    }
    for (int i=0;i<s.size();i++){
        if (a[i]==1){
            cout << char(i+'A');
            return 0;
        }
    }
    return 0;
}