没人发？

#include<iostream>
#include<cmath>
using namespace std;


int main()
{
    int m,n,sum = 0;
    cin >> m >> n;
    for(int i = m;i <= n;i++){
        int x = i,ge = x%10,bai = x/10%10,qian = x/100%x;
        if(pow(ge,3) + pow(bai,3) + pow(qian,3) == x){
            cout << x << ' ';
            sum++;
        }
    }
    if(sum == 0){
        cout << "NULL";
    }
    return 0;
}