Submission

Score: 100

User: purihorharin

Problemset: เรียงสตริง

Language: c

Time: 0.002 second

Submitted On: 2026-03-20 18:45:23

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

int cmp (const void* a, const void* b) {
    return *(const char*)a - *(const char*)b;
}

int main () {
    char buf[21];
    scanf("%s", buf);
    qsort(buf, strlen(buf), 1, &cmp);
    char last = 0;
    for (int i = 0; buf[i]; i++) {
        if (last == buf[i]) continue;
        last = buf[i];
        putchar(last);
        putchar(' ');
    }
}