Submission

Score: 100

User: Peam

Problemset: ตัวอักษรตัวแรกในคำ

Language: c

Time: 0.002 second

Submitted On: 2025-10-08 20:47:36

#include <stdio.h>
int main(){
    char string[21];
    scanf("%s", string);

    int arr[26] = {0};
    for(int i = 0; string[i] != '\0'; i++){
        arr[string[i] - 'A']++;
    }

    for(int i = 0; i < 26; i++){
        if(arr[i] == 1){
            printf("%c", i + 'A');
            break;
        }
    }

    return 0;
}