Submission

Score: 100

User: vachirasawin

Problemset: ตัวอักษรตัวแรกในคำ

Language: c

Time: 0.003 second

Submitted On: 2025-10-11 23:48:33

// POSN Computer 66 | Final Camp
// Exam Bank
// C Programming | finalCamp66_5.c

#include <stdio.h>

int main() {
    char str[50], temp;
    int i, j, count = 0, check;

    scanf("%s", str);

    while (str[count] != '\0') count++;

    for (i = 0; i < count - 1; i ++) {
        for (j = 0; j < count - i - 1; j++) {
            if (str[j + 1] < str[j]) {
                temp = str[j];
                str[j] = str[j + 1];
                str[j + 1] = temp;
            }
        }
    }

    for (i = 0; i < count; i++) {
        check = 1;
        for (j = 0; j < count; j++) {
            if(i != j && str[i] == str[j]) {
                check = 0;
                break;
            }
        }

        if (check) {
            printf("%c", str[i]);
            break;
        }
    }

    return 0;
}