Submission #361670

#	Time	Username	Problem	Language	Result	Execution time	Memory
361670		ngpin04	Bank (IZhO14_bank)	C++14	100 / 100	469 ms	26292 KiB

bank

#include <bits/stdc++.h>

using namespace std;

int a[21];
int b[20];
int sum[1 << 20];
int n,m;

bool dp[1 << 20][21];

int getbit(int x, int i)
{
    return (x >> i) & 1;
}

int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    //freopen("bank.in","r",stdin);
    //freopen("bank.out","w",stdout);
    cin >> n >> m;
    for (int i = 1; i <= n; i++)
        cin >> a[i], a[i] += a[i - 1];

    for (int i = 0; i < m; i++)
        cin >> b[i];

    for (int mask = 0; mask < (1 << m); mask++)
    for (int i = 0; i < m; i++)
        if (getbit(mask, i))
            sum[mask] += b[i];

    dp[0][0] = true;
    for (int mask = 0; mask < (1 << m); mask++)
    for (int i = 0; i <= n; i++) if (dp[mask][i])
    {
        if (sum[mask] == a[i])
        {
            if (i == n)
                return cout << "YES\n", 0;
            dp[mask][i + 1] = true;
        } else {
            for (int j = 0; j < m; j++)
                if (!getbit(mask, j))
                    dp[mask | (1 << j)][i] = true;
        }
    }
    cout << "NO\n";
    return 0;
}

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