Submission #1295641

#	Time	Username	Problem	Language	Result	Execution time	Memory
1295641		hasan	Ice Hockey World Championship (CEOI15_bobek)	C++20	100 / 100	603 ms	8780 KiB

bobek

#include <bits/stdc++.h>
using namespace std;

#define endl '\n'
#define int int_fast64_t
#define ul uint_fast32_t
#define ll int_fast64_t
#define dll long double
#define ull uint_fast64_t
#define spektar this_thread::sleep_for(chrono::milliseconds(1000))

void solve(){
    ll n,m;
    cin >> n >> m;
    vector<ll> k(n);
    for(int i=0; i<n; i++) cin >> k[i];
    vector<ll> kk;
    ll ss=0;
    for(ll i=0; i<(1<<(n/2)); i++){
        ll s=0;
        for(int j=0; j<n/2; j++){
            if((1<<j)&i){
                s+=k[j];
            }
        }
        if(s<=m){
            kk.push_back(s);
        }
    }
    sort(kk.begin(),kk.end());
    for(ll i=0; i<(1<<(n-n/2)); i++){
        ll s=0;
        for(int j=n/2; j<n; j++){
            if((1<<(j-n/2))&i){
                s+=k[j];
            }
        }
        ll a=0;
        if(upper_bound(kk.begin(),kk.end(),m-s)==kk.end()) a=kk.size();
        else if(upper_bound(kk.begin(),kk.end(),m-s)==kk.begin()) a=0;
        else a=upper_bound(kk.begin(),kk.end(),m-s)-kk.begin();
        ss+=a;
    }
    cout << ss << endl;
}

signed main(){
    //freopen("input.txt","r",stdin);
    //freopen("output.txt","w",stdout);
    
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    cout.tie(nullptr);

    int t=1;
    //cin >> t;
    while(t--){
        solve();
    }
}

• 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