#include <bits/stdc++.h>
using namespace std;
const int nmax = 5e5 + 1;
const long long inf = 1e18;
int32_t main() {
ios_base::sync_with_stdio(false);
cin.tie(nullptr);
cout.tie(nullptr);
int n, t;
cin >> n >> t;
long long ramas = 0;
vector<int> v;
for (int i = 0; i < n; i++) {
int a;
cin >> a;
a = min(a % t, t - (a % t));
v.push_back(a);
ramas += (a);
}
sort(v.begin(), v.end());
long long sum = 0;
long long minn = inf;
for (int i = 0; i < n; i++) {
minn = min(minn, i * v[i] - sum + ramas - (n - i) * v[i]);
// cout << i * v[i] - sum << " " << ramas - (n - i) * v[i] << '\n';
sum += v[i];
ramas -= v[i];
}
cout << minn;
return 0;
}
