Submission

Score: 100

User: I_am_me

Problemset: ตัวอักษรตัวแรกในคำ

Language: c

Time: 0.003 second

Submitted On: 2025-10-12 21:05:56

#include <stdio.h>

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

    int len=0;
    int i = 0;
    while(word[i]!='\0'){
        len++ ;
        i++ ;
    }
    int bucket[26] = {0} ;
    for(int i = 0;i<len;i++) bucket[word[i]-65] ++ ;

    char min = 91 ;
    for(int i = 0;i<len;i++){
        if (word[i]<min && bucket[word[i]-65] == 1) min = word[i] ;
    }
    printf("%c",min) ;

    return 0;
}