Submission #1188265

#	Time	Username	Problem	Language	Result	Execution time	Memory
1188265		ffeyyaae_	Bank (IZhO14_bank)	C++20	100 / 100	92 ms	8644 KiB

bank

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

const int N = (1<<20);

int n, m;
int keep[21], bank[21];
pair<int,int> dp[N];

int main()
{
    ios_base::sync_with_stdio(0); cin.tie(0);
    cin >> n >> m;
    for( int i=0;i<n;i++ ) cin >> keep[i];
    for( int i=0;i<m;i++ ) cin >> bank[i];
    for( int i=0;i<N;i++ ) dp[i] = {-1, -1};
    dp[0] = {0, 0};
    for( int mask=0;mask<(1<<m);mask++ )
    {
        for( int i=0;i<m;i++ )
        {
            if( !( mask & (1<<i) ) ) continue;
            int prev = (mask ^ (1<<i));
            auto [peo, left] = dp[prev];
            if( peo == -1 ) continue;
            if( left+bank[i] < keep[peo] )
            {
                dp[mask] = { peo, left+bank[i] };
            }
            else if( left+bank[i] == keep[peo] )
            {
                dp[mask] = { peo+1, 0 };
            }
        }
        if( dp[mask].first == n )
        {
            cout << "YES";
            return 0;
        }
    }
    cout << "NO";
    return 0;
}

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