Submission #1140967

#	Time	Username	Problem	Language	Result	Execution time	Memory
1140967		Aliyyiakbar	Bank (IZhO14_bank)	C++20	71 / 100	1096 ms	17476 KiB

bank

/*
#ifndef ONLINE_JUDGE
#include "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/tree_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>;

mt19937 rng(chrono::steady_clock().now().time_since_epoch().count());

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

int n, m;
set<vector<int>>BIT[sz];

void solve()
{
    cin >> n >> m;
    for (int i = 0; i < n; ++i)
    {
        cin >> a[i];
    }
    for (int i = 0; i < m; ++i)
    {
        cin >> b[i];
    }
    auto sum = [&](const vector<int> &indicies)
    {
        int sum = 0;
        for (auto index : indicies)
        {
            sum += b[index];
        }
        return sum;
    };
    for (int i = 0; i < n; ++i)
    {
        for (int mask = 1; mask < (1LL << m); ++mask)
        {
            vector<int> ind;
            for (int j = 0; j < m; ++j)
            {
                if (mask & (1LL << j))
                {
                    ind.ep(j);
                }
            }
            if (sum(ind) == a[i])
            {
                BIT[i].insert(ind);
            }
        }
    }
    for (int i = 0; i < n; ++i)
    {
        if (BIT[i].empty())
        {
            cout << "NO\n";
            return;
        }
    }
    function<bool(int, vector<vector<int>> &)> backtrack = [&](int i, vector<vector<int>> &current)
    {
        if (i == n)
        {
            return true;
        }
        for (const auto &subset : BIT[i])
        {
            bool conflict = false;
            for (const auto &chosen : current)
            {
                vector<int> intersection;
                set_intersection(all(chosen), all(subset), back_inserter(intersection));
                if (!intersection.empty())
                {
                    conflict = true;
                    break;
                }
            }
            if (!conflict)
            {
                current.ep(subset);
                if (backtrack(i + 1, current))
                {
                    return true;
                }
                current.pop_back();
            }
        }
        return false;
    };
    vector<vector<int>> current;
    cout << (backtrack(0, current) ? "YES" : "NO") << '\n';
}

signed main()
{
    $AzH_TxdmN$
    int t = 1;
    // cin >> t;
    while (t--)
    {
        solve();
    }
}

• Subtask 1: 19 / 19
• Subtask 2: 25 / 25
• Subtask 3: 27 / 27
• Subtask 4: 0 / 29