Random Teams

#include <bits/stdc++.h>
using namespace std;

#define int long long
#define pb push_back

int f(int n){
    int hi = n * (n - 1);
    hi /= 2;
    return hi;
}

signed main()
{
    int n , k;
    cin >> n >> k;
    // second number in output
    int big = n - (k - 1);
    int maximum = f(big);

    //first number in output
    int small = n / k;
    int minumum = k * f(small);
    minumum += ((n % k) * small);

    cout << minumum << " " << maximum << endl;
}