题解 | 提取不重复的整数

#include <stdio.h>

int main() {
    int n,m,arr[10]={0};
    scanf("%d",&n);
    while (n!=0) {
        m = n % 10;
        n = n / 10;
        arr[m]++;
        if (arr[m] == 1) {
            printf("%d",m);
        }
    }
}