Submission

Status:

PP------P-

Score: 30

User: lazybw_

Problemset: ตัวอักษรตัวแรกในคำ

Language: cpp

Time: 0.003 second

Submitted On: 2025-01-18 21:05:12

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

int main() {
    cin.tie(nullptr)->sync_with_stdio(false); cout.tie(nullptr);
    set<char> s, ss; string x; cin>>x; for (auto i : x) {
        if (s.count(i) == 0) s.insert(i);
        else ss.insert(i);
    }
    for (auto i : x) {
        if (ss.count(i) == 0) {
            cout<<i; return 0;
        }
    }

    return 0;
}