Submission #484481

#	Time	Username	Problem	Language	Result	Execution time	Memory
484481		Sho10	Ice Hockey World Championship (CEOI15_bobek)	C++17	100 / 100	509 ms	8648 KiB

bobek

#include <bits/stdc++.h> //Andrei Alexandru a.k.a Sho
#define ll long long
#define double long double
#pragma GCC optimize("O3")
#pragma GCC optimize("Ofast")
#define aint(a) (a).begin(), (a).end()
#define f first
#define s second
#define pb push_back
#define mp make_pair
#define pi pair
#define rc(s) return cout<<s,0
#define endl '\n'
#define mod 998244353
#define PI 3.14159265359
#define INF 1000000005
#define LINF 1000000000000000005ll
#define CODE_START  ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
using namespace std;
ll n,m,a[45];
vector<ll>v;
int32_t main(){
CODE_START;
cin>>n>>m;
for(ll i=0;i<n;i++)
{
    cin>>a[i];
}
ll ans=0;
ll x=(n)/2;
ll y=n-x;
for(ll i=0;i<(1ll<<y);i++)
{
    ll sum=0;
    for(ll j=x;j<n;j++)
    {
        if(((1ll<<((j-x))&i))){
sum+=a[j];
        }
    }
v.pb(sum);
}
sort(v.begin(),v.end());
for(ll i=0;i<(1ll<<x);i++)
{
    ll sum=0;
    for(ll j=0;j<x;j++)
    {
        if((1ll<<j)&i){
                sum+=a[j];
        }
    }
    if(sum>m){
        continue;
    }
   ll pos=upper_bound(v.begin(),v.end(),m-sum)-v.begin();
   if(pos>=1){
    ans+=pos;
   }
}
cout<<ans<<endl;
}

• 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