This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <bits/stdc++.h>
using namespace std;
int n, m, a[20], b[20], sum[1 << 20];
vector<int> states[20];
int curr[20];
bool vis[20][1 << 20], dp[20][1 << 20];
bool solve(int idx, int mask) {
if(idx == n) return true;
//if(vis[idx][mask]) return dp[idx][mask];
//vis[idx][mask] = true;
for(int nxt: states[idx]) {
if((nxt & mask) == 0 && solve(idx + 1, nxt | mask)) return dp[idx][mask] = true;
}
return false;
}
int main() {
ios::sync_with_stdio(false);
cin.tie(0);
cin >> n >> m;
for(int i = 0; i < n; i++) cin >> a[i];
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(!(mask >> i & 1)) sum[mask] += b[i];
for(int i = 0; i < n; i++) if(sum[mask] == a[i]) states[i].push_back(mask);
}
if(solve(0, 0)) cout << "YES" << endl;
else cout << "NO" << endl;
}
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