Submission

Score: 100

User: CA

Problemset: ตัวอักษรตัวแรกในคำ

Language: cpp

Time: 0.004 second

Submitted On: 2026-09-25 12:09:23

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

string wrd;

int main() {
    cin >> wrd;
    char f = 'Z' + 1;
    int l = wrd.size();
    for (int i = 0; i < l; i++) {
        char c = wrd[i];
        for (int j = i + 1; j < l; j++) {
            char n = wrd[j];
            if (c == n) {
                wrd[i] = 'Z' + 1;
                wrd[j] = 'Z' + 1;
            }
        }
    }
    for (char c : wrd) {
        f = min(f, c);
    }
    cout << f << '\n';
    return 0;
}