제출 #74554

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
74554		Adhyyan1252	Ice Hockey World Championship (CEOI15_bobek)	C++11	100 / 100	357 ms	33816 KiB

bobek

#include<bits/stdc++.h>

using namespace std;
typedef long long ll;
ll n, m;
vector<ll> a, b, c;
void brute(int i, int e, ll cost){
	if(i == e+1){
		b.push_back(cost);
		return;
	}
	brute(i+1, e, cost + a[i]);
	brute(i+1, e, cost);
}

int main(){
	cin>>n>>m;
	a.resize(n);
	for(int i = 0; i < n; i++){
		cin>>a[i];
	}
	b.reserve(1000000); c.reserve(1000000);
	brute(0, n/2, 0);
	c = b;
	b.clear();
	brute(n/2+1, n-1, 0);
	ll ans =0 ;
	sort(b.begin(), b.end());
	sort(c.begin(), c.end());
	int pntr = c.size() - 1;
	for(int i = 0; i < b.size(); i++){
		while(pntr >= 0 && c[pntr] + b[i] > m){
			pntr--;
		}
		ans += pntr + 1;
	}
	cout<<ans<<endl;
}

컴파일 시 표준 에러 (stderr) 메시지

bobek.cpp: In function 'int main()':
bobek.cpp:31:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i = 0; i < b.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