Submission #1110793

#	Time	Username	Problem	Language	Result	Execution time	Memory
1110793		aliyousef	Ice Hockey World Championship (CEOI15_bobek)	C++17	100 / 100	338 ms	10692 KiB

bobek

#include <bits/stdc++.h>
using namespace std;
#define endl '\n'
using ll=long long;
ll a[41];
vector<ll>v;
int n;
ll m;
ll ans=0;
void rec(int i,ll sm){
    if(i==n/2){
        v.push_back(sm);
        return;
    }
    rec(i+1,sm+a[i]);rec(i+1,sm);
}
void rec2(int i,ll sm){
    if(i==n){
        int idx=upper_bound(v.begin(),v.end(),m-sm)-v.begin();
        ans+=idx;
        return;
    }
    rec2(i+1,sm+a[i]);rec2(i+1,sm);
}
signed main() {
	cin.tie(0)->sync_with_stdio(0);
	cin>>n>>m;
	for(int i=0;i<n;i++)cin>>a[i];
	rec(0,0);
	sort(v.begin(),v.end());
	rec2(n/2,0);
	cout<<ans;
}

• 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