Submission

Score: 100

User: kenkong587

Problemset: ตัวอักษรตัวแรกในคำ

Language: c

Time: 0.003 second

Submitted On: 2026-10-05 17:39:43

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

int main(){

    char name[20];

    scanf("%s", name);

    for(int i = 0; i < strlen(name); i++){
        if(name[i] == '0'){
            continue;
        }
        int is_repeated = 0;
        for(int j = i + 1; j < strlen(name); j++){
            if(name[i] == name[j]){
                name[j] = '0';
                is_repeated = 1;
            }
        }
        if(is_repeated == 1){
            name[i] = '0';
        }
    }

    char first = 'Z' + 1;

    for(int i = 0; i < strlen(name); i++){
        if(name[i] != '0' && name[i] < first){
            first = name[i];
        }
    }

    if(first <= 'Z'){
        printf("%c", first);
    }

    return 0;
}