题解 | 数字之和

#include <iostream>
using namespace std;

int func(long long n) {
    int res = 0;
    while (n) {
        res += n % 10;
        n /= 10;
    }
    return res;
}

int main() {
    long long n;
    while (cin >> n) {
        cout << func(n) << " " << func(n * n) << endl;
    }
}