제출 #1291471

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1291471		Jawad_Akbar_JJ	Ice Hockey World Championship (CEOI15_bobek)	C++20	0 / 100	186 ms	29084 KiB

bobek

#include <iostream>
#include <vector>
#include <algorithm>

using namespace std;
#define int long long
int a[1<<20], Sum[1<<20];

signed main(){
	int n1, M, n2, Ans = 0;
	cin>>n1>>M;
	n2 = n1 / 2, n1 -= n2;

	vector<int> v1, v2;
	for (int i=0;i<n1;i++)
		cin>>a[1<<i];
	for (int i=0;i<(1<<n1);i++){
		if (i)
			Sum[i] = Sum[i ^ (i & -i)] + a[i & -i];
		v1.push_back(Sum[i]);
	}

	for (int i=0;i<n2;i++)
		cin>>a[1<<i];
	for (int i=0;i<(1<<n2);i++){
		if (i)
			Sum[i] = Sum[i ^ (i & -i)] + a[i & -i];
		v2.push_back(Sum[i]);
	}

	sort(begin(v1), end(v1));
	sort(begin(v2), end(v2));

	for (int i=v1.size()-1, l=0;i>=0;i--){
		while (v1[i] + v2[l] <= M)
			l++;
		Ans += l;
	}
	cout<<Ans<<'\n';
}

• Subtask 1: 0 / 10
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