Submission

Score: 100

User: ChanakanStudy

Problemset: ตัวอักษรตัวแรกในคำ

Language: cpp

Time: 0.004 second

Submitted On: 2026-10-10 22:45:17

#include <iostream>
#include <vector>
#include <algorithm>
#include <string>
#include <cmath>
#include <queue>
#include <stack>
#include <climits>
#include <map>
#include <numeric>
#include <iomanip>
using namespace std;
using ll = long long;
int a[26];

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