Submission #1121545

#	Time	Username	Problem	Language	Result	Execution time	Memory
1121545		vjudge1	Ice Hockey World Championship (CEOI15_bobek)	C++17	100 / 100	399 ms	8728 KiB

bobek

/*
#ifndef ONLINE_JUDGE
#include "AkbarKING.h" // aska geldi akbarking.h
#else
#define debug(...)
#define debugArr(...)
#define debugG(...)
#endif
*/
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/hash_policy.hpp>

#define int long long
#define $AzH_TxdmN$ ios_base::sync_with_stdio(0);cin.tie(nullptr);cout.tie(nullptr);
#pragma GCC target("sse,sse2,sse3,ssse3,popcnt,abm,mmx,tune=native")
#pragma GCC optimize("Ofast")
#pragma GCC optimize("no-stack-protector")
#pragma GCC optimize("unroll-loops")
#pragma GCC optimize("fast-math")

#define ep emplace_back
#define pb push_back
#define pii pair<int,int>
#define all(v) v.begin(),v.end()
#define rall(v) v.rbegin(),v.rend()

using namespace std;
using namespace __gnu_pbds;

template <typename T>
using __indexed_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
template <typename T>
using __indexed_multiset = tree<T, null_type, less_equal<T>, rb_tree_tag, tree_order_statistics_node_update>;

const int sz = 3e5+9;
const int LOG = 63;
const int MOD = 1e9+7;
const int INF = 1e18;
int a[LOG];

int n,m;
vector<int>rHalf;

void solve()
{
    cin>>n>>m;
    for (int i = 1; i <= n ; ++i)
    {
        cin>>a[i];
    }
    if (n == 1)
    {
        cout<<1+(a[1] <= m)<<'\n';
        return;
    }
    for (int mask = 0; mask < (1LL<<(n - n/2)); ++mask)
    {
        int sm = 0;
        for (int i = 0; i < (n - n/2); ++i)
        {
            if (mask & (1LL<<i))
            {
                sm += a[n/2+1+i];
            }
        }
        rHalf.ep(sm);
    }
    sort(all(rHalf));
    int res = 0;
    for (int mask = 0; mask < (1LL<<(n/2)); ++mask)
    {
        int sm = 0;
        for (int i = 0; i < n/2; ++i)
        {
            if (mask & (1LL<<i))
            {
                sm += a[i+1];
            }
        }
        res += upper_bound(all(rHalf),m-sm)-rHalf.begin();;
    }
    cout<<res<<'\n';
}

signed main()
{
    $AzH_TxdmN$
    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