Submission

Score: 100

User: Krispans

Problemset: ตัวอักษรตัวแรกในคำ

Language: cpp

Time: 0.004 second

Submitted On: 2026-09-25 15:58:26

#include <iostream>
#include <vector>
using namespace std;

int main(){

    string s;
    cin >> s;
    int n = s.length();
    for (int i=0;i<n; i++){
        for (int j=0; j<n-1; j++){
            if (s[j] > s[j+1]){
                auto temp = s[j];
                s[j] = s[j+1];
                s[j+1] = temp;
            }
        }
    }
    char output = s[s.length()-1];
    for (int i=0; i<n-1; i++){
        if (s[i] != s[i+1]){
            output = s[i];
            break;
        }
        else {
            i+=1;
        }
    }
    cout << output;
}