要么太难看不懂，要么太简单降低智商？ 那么这个题解就很适合你

#include <iostream>
using namespace std;

int main() {
    int m, n, cnt = 0;
    cin >> m >> n;
    for(int i = m; i <= n; i++) {
        if(i < 100 || i > 999) continue;
        int a = i / 100;
        int b = i / 10 % 10;
        int c = i % 10;
        
        if(a*a*a + b*b*b + c*c*c == i) {
            cout << i << " ";
            cnt++;
        }
    }
    if(cnt == 0) {
        cout << "No Answer.";
    } else {
        cout << endl << cnt;
    }
    return 0;
}