#include <bits/stdc++.h> using namespace std; // #define int long long #define fi first #define se second #define mp make_pair #define setpre(n) fixed << setprecision(n) #define sz(x) (int) x.size() typedef long long ll; typedef long double ld; typedef pair<int, int> pii; typedef pair<ll, int> pli; typedef pair<int, ll> pil; typedef pair<ll, ll> pll; typedef pair<ld, int> pdi; typedef pair<int, ld> pid; #define Task "Bank" const int N = 27; int a[N], b[N]; bool dp[N][1 << 20]; signed main() { // freopen("test.txt", "r", stdin); // freopen("out.txt", "w", stdout); if (fopen(Task".in", "r")) { freopen(Task".in", "r", stdin); freopen(Task".out", "w", stdout); } ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0); int n, m; cin >> n >> m; for (int i = 1; i <= n; i++) cin >> a[i]; for (int i = 0; i < m; i++) cin >> b[i]; dp[0][0] = true; for (int i = 1; i <= n; i++) for (int mask1 = 0; mask1 < (1 << m); mask1++) { if (!dp[i - 1][mask1]) continue; for (int mask2 = 0; mask2 < (1 << m); mask2++) { if (mask1 & mask2) continue; int sum = 0; for (int j = 0; j < m; j++) if ((mask2 >> j) & 1) sum += b[j]; if (sum == a[i]) dp[i][mask1 | mask2] = true; } } bool sas = false; for (int mask = 0; mask < (1 << m); mask++) if (dp[n][mask]) { sas = true; break; } cout << ((sas) ? "YES" : "NO"); return 0; }

bank.cpp: In function 'int main()':
bank.cpp:28:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   28 |         freopen(Task".in", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
bank.cpp:29:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   29 |         freopen(Task".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~