#include "bits/stdc++.h"
using namespace std;
int main() {
    long long n, m, in, s = 0, ans = 0; cin >> n >> m;
    unordered_map<lint, lint> h;
    ++h[0];
    for (int i = 0; i < n; ++i) {
        cin >> in;
        s = (s + in) % m;
        ++h[s];
    }
    for (auto i : h) {
        ans += i.second*(i.second - 1) / 2;
    }
    cout << ans << endl;
}