Submission #259613

#	Time	Username	Problem	Language	Result	Execution time	Memory
259613		Berted	Ice Hockey World Championship (CEOI15_bobek)	C++14	100 / 100	242 ms	20840 KiB

bobek

#include <iostream>
#include <vector>
#include <algorithm>
#define ll long long
using namespace std;
int n;
ll m, ar[41], res = 0;
vector<ll> pos[2];

void rs(int s, int l, ll k, int id)
{
	if (s < l)
	{
		rs(s + 1, l, k, id);
		rs(s + 1, l, k + ar[s], id);
	}
	else {pos[id].push_back(k);}
}

int main()
{
	cin >> n >> m;
	for (int i = 0; i < n; i++) cin >> ar[i];
	rs(0, n / 2, 0, 0);
	rs(n / 2, n, 0, 1);
	sort(pos[0].begin(), pos[0].end());
	sort(pos[1].begin(), pos[1].end());
	ll R = pos[1].size() - 1;
	for (int i = 0; i < pos[0].size(); i++)
	{
		while (R >= 0 && pos[0][i] + pos[1][R] > m) {R--;}
		res += (R + 1);
	}
	cout << res << "\n";
	return 0;
}

Compilation message (stderr)

bobek.cpp: In function 'int main()':
bobek.cpp:29:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (int i = 0; i < pos[0].size(); i++)
                  ~~^~~~~~~~~~~~~~~

• 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