Submission #952162

#	Time	Username	Problem	Language	Result	Execution time	Memory
952162		Bzslayed	Ice Hockey World Championship (CEOI15_bobek)	C++17	100 / 100	330 ms	9952 KiB

bobek

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp> 
#include <ext/pb_ds/tree_policy.hpp> 

using namespace std;
using namespace __gnu_pbds; 

#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")

#define ll long long
#define ull unsigned long long
#define ld long double
#define pll pair<ll, ll>
#define pii pair<int, int>
#define coutpair(p) cout << p.first << " " << p.second << "|"

typedef tree<int, null_type, less<int>, rb_tree_tag, tree_order_statistics_node_update> ordered_set;
typedef tree<int, null_type, less_equal<int>, rb_tree_tag, tree_order_statistics_node_update> ordered_multiset;

int main(){
    ios_base::sync_with_stdio(0); 
    cin.tie(0); 
    cout.tie(0);

    ll n, m; cin >> n >> m;
    int szn = n/2, szm = n-szn;

    ll fi[szn], se[szm];
    for (int i=0; i<szn; i++) cin >> fi[i];
    for (int i=0; i<szm; i++) cin >> se[i];

    vector<ll> v;
    for (int i=0; i<(1<<szn); i++){
        ll cursum = 0;
        for (int j=0; j<szn; j++){
            if ((i&(1<<j)) != 0) cursum += fi[j];
        }
        v.push_back(cursum);
    }

    sort(v.begin(), v.end());

    ll ans = 0;
    for (int i=0; i<(1<<szm); i++){
        ll cursum = 0;
        for (int j=0; j<szm; j++){
            if ((i&(1<<j)) != 0) cursum += se[j]; 
        }

        ll ways = upper_bound(v.begin(), v.end(), m-cursum) - v.begin();
        ans += ways;
    }
    
    cout << ans;

    return 0;
}

• 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