题解 | #提取不重复的整数#

#include<iostream>

using namespace std;

int main(){
    int N, num[10]={0};
    cin >> N;
    while(N != 0){
        int n = N % 10;
        if(num[n] == 0){
            cout << n;
            num[n] = 1;
        }
        N = N / 10;
    }
}