#include<iostream>
#define int long long
using namespace std;
const int N = 1e8 + 10;
int n, w, a[N], sum, ans;
signed main() {

	cin >> n >> w;
	for (int i = 1; i <= n; i++) cin >> a[i];
	for (int i = 1; i <= n; i++) sum += a[i];
	if (sum < w) {
		cout << 1;
		return 0;
	}
	if (sum % w == 0) {
		ans = sum / w;
	} else {
		ans = sum / w + 1;
	}
	cout << ans;
}

84分求调