Submission #1237962

#	Time	Username	Problem	Language	Result	Execution time	Memory
1237962		Jer	Bank (IZhO14_bank)	C++20	71 / 100	1093 ms	412 KiB

bank

#include <bits/stdc++.h>

using namespace std;

const int MAXN = 25;

int n, m;
int a[MAXN], b[MAXN], used[MAXN];

bool can_pay(int curr)
{
    if (curr == n)
        return true;

    int target = a[curr];

    int subset_size = 1 << m;
    for (int mask = 1; mask < subset_size; ++mask)
    {
        int sum = 0;
        vector<int> indices;

        for (int i = 0; i < m; ++i)
            if ((mask >> i) & 1)
            {
                if (used[i])
                {
                    sum = -1;
                    break;
                }
                sum += b[i];
                indices.push_back(i);
            }

        if (sum == target)
        {
            for (int i : indices)
                used[i] = true;
            if (can_pay(curr + 1))
                return true;
            for (int i : indices)
                used[i] = false;
        }
    }

    return false;
}

int main()
{
    scanf("%d%d", &n, &m);
    for (int i = 0; i < n; i++)
        scanf("%d", &a[i]);

    for (int i = 0; i < m; i++)
        scanf("%d", &b[i]);

    sort(a, a + n);

    printf("%s\n", (can_pay(0)) ? "YES" : "NO");

    return 0;
}

Compilation message (stderr)

bank.cpp: In function 'int main()':
bank.cpp:51:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   51 |     scanf("%d%d", &n, &m);
      |     ~~~~~^~~~~~~~~~~~~~~~
bank.cpp:53:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   53 |         scanf("%d", &a[i]);
      |         ~~~~~^~~~~~~~~~~~~
bank.cpp:56:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   56 |         scanf("%d", &b[i]);
      |         ~~~~~^~~~~~~~~~~~~

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