제출 #1174055

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1174055		Dan4Life	Ice Hockey World Championship (CEOI15_bobek)	C++20	100 / 100	175 ms	20892 KiB

bobek

#include <bits/stdc++.h>
using namespace std;
#define pb push_back
#define sz(a) (int)a.size()
#define all(a) begin(a),end(a)
using ll = long long;
int n;
ll m, ans, tot, a[50];
 
int main(){
	ios_base::sync_with_stdio(false); cin.tie(0);
	cin >> n >> m; vector<ll> v, w;
	for(int i = 0; i < n; i++) cin >> a[i];
	sort(a,a+n); int xd = n/2;
	for(ll mask = 0; mask < (1ll<<(n-xd)); mask++){
		ll cost = 0;
		for(int i = 0; i < n-xd; i++)
			cost+=(mask>>i&1)*a[xd+i];
		if(cost<=m) w.pb(cost);
	}
	for(ll mask = 0; mask < (1ll<<xd); mask++){
		ll cost = 0;
		for(int i = 0; i < xd; i++)
			cost+=(mask>>i&1)*a[i];
		if(cost<=m) v.pb(-cost);
	}
	sort(all(v)); sort(all(w)); int j = 0;
	for(int i = 0; i < sz(v); i++){
		while(j<sz(w) and w[j]<=m+v[i]) j++;
		ans+=j;
	}
	cout << ans << "\n";
}

• 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