Submission

Score: 100

User: punzacp555

Problemset: ตัวอักษรตัวแรกในคำ

Language: cpp

Time: 0.004 second

Submitted On: 2026-09-25 14:35:01

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

int main() {
    cin.tie(0)->sync_with_stdio(0);
    string s;
    cin >> s;

    map<char, int> mp;

    for(int i=0; i<s.size(); i++) mp[s[i]]++;
    
    for(auto it=mp.begin(); it!=mp.end(); it++) {
        if(it->second == 1) {cout << it->first; break;}
    }

    return 0;
}