Submission #208152

#	Time	Username	Problem	Language	Result	Execution time	Memory
208152		alidoosti	Ice Hockey World Championship (CEOI15_bobek)	C++14	100 / 100	571 ms	8684 KiB

bobek

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

const int maxn = 42;
int n, m, ans, a[maxn];
vector <int> v;

int32_t main() {
	cin >> n >> m;
	for (int i = 0; i < n; i++) cin >> a[i];
	for (int msk = 0; msk < (1 << (n / 2)); msk++) {
		int S = 0;
		for (int j = 0; j < n / 2; j++) {
			if (msk & (1 << j)) S += a[j];
		}
		v.push_back(S);
	}
	sort(v.begin(), v.end());
	for (int msk = 0; msk < (1 << (n - (n / 2))); msk++) {
		int S = 0;
		for (int j = 0; j < n - (n / 2); j++) {
			if (msk & (1 << j)) S += a[j + (n / 2)];
		}
		ans += upper_bound(v.begin(), v.end(), m - S) - v.begin();
	}
	cout << ans;
	return 0;
}

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 10 / 10
• Subtask 5: 10 / 10
• Subtask 6: 10 / 10
• Subtask 7: 10 / 10
• Subtask 8: 10 / 10
• Subtask 9: 10 / 10
• Subtask 10: 10 / 10