Submission

Score: 10

User: peilin

Problemset: ตัวอักษรตัวแรกในคำ

Language: c

Time: 0.002 second

Submitted On: 2025-10-12 13:18:34

#include <stdio.h>
#include <string.h>

int main() {
    char word[21];
    scanf("%s", word);

    int len = strlen(word);
    int is_unique;

    for (int i = 0; i < len; i++) {
        is_unique = 1;
        for (int j = 0; j < len; j++) {
        	if(word[i]>word[j]) {
        		word[i]=word[j];
			}
            if (i != j && word[i] == word[j]) {
                is_unique = 0;
                break;
            }
        }
        if (is_unique) {
            printf("%c\n", word[i]);
            break;
        }
    }

    return 0;
}