Submission

Score: 80

User: Zsawova

Problemset: ตัวอักษรตัวแรกในคำ

Language: cpp

Time: 0.004 second

Submitted On: 2026-10-12 20:15:02

//
// Created by ASUS on 12/10/2026.
//

#include <iostream>
#include <string>
#include <cctype>

using namespace std;

int main() {

    string input; cin >> input;

    const unsigned long length = input.length();



    for (int k = 0; k < length; k++) {
        if (isalpha(input[k]) == 0){
            return 0;
        }
    }





    int max = 0;
    unsigned char a = static_cast<int>(input[0]);

    for (int i = 0; i < length; i++) {
        if (a > static_cast<int>(input[i])){

            int count1 = 0;
            for (int j = 0; j < length; j++) {
                if (j != i && input[i] == input[j]) {
                    count1++;
                }
            }
            if (count1 == 0) {
                a = static_cast<int>(input[i]);
                max = i;
            }
        }
    }

    cout << input[max] << endl;



    return 0;
}