Submission #361669

#	Time	Username	Problem	Language	Result	Execution time	Memory
361669		ngpin04	Bank (IZhO14_bank)	C++14	0 / 100	3 ms	512 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;
}

Compilation message (stderr)

bank.cpp: In function 'int main()':
bank.cpp:21:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   21 |     freopen("bank.in","r",stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~
bank.cpp:22:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   22 |     freopen("bank.out","w",stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

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