#include <bits/stdc++.h>   using namespace std;   int main() {     ios_base::sync_with_stdio(false);     cin.tie(nullptr);     int n, p, a[100000], sum = 0;     cin >> n >> p;     for (int i = 0; i < n; i++) {       cin >> a[i];       sum += a[i];       sum %= p;     }     sum = (sum + p - (a[0] % p)) % p;     int cur = a[0] % p, ans = cur + sum;     for (int i = 1; i < n - 1; ++i) {       cur = (cur + a[i]) % p, sum = (sum + p - (a[i] % p)) % p;       ans = max(ans, cur + sum);     }     cout << ans;     return 0;   }   