Submission

Score: 100

User: koon

Problemset: ตัวอักษรตัวแรกในคำ

Language: cpp

Time: 0.003 second

Submitted On: 2025-11-18 19:25:54

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

int main() {
    cin.tie(0)->sync_with_stdio(false);
    string s;
    cin >> s;
    map<char, int> cnt;
    for (auto i : s) {
        cnt[i]++;
    }
    for (auto i : cnt) {
        if (i.second == 1) {
            cout << i.first;
            return 0;
        }
    }
    return 0;
};