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;
vector<int> v[21];
int main()
{
ios_base::sync_with_stdio(0); cin.tie(0);
int n,m,s,l;
cin>>n>>m;
int p[n+1],a[m];
p[0]=0;
v[0].push_back(0);
for (int i=1;i<=n;++i)
cin>>p[i],p[i]+=p[i-1];
for (int i=0;i<m;++i)
cin>>a[i];
for (int i=1;i<(1<<m);++i)
{
s=0;
for (int j=0;j<m;++j)
if (i&(1<<j))
s+=a[j];
l=0;
for (int j=1;j<=n;++j)
if (s==p[j])
l=j;
if (s!=p[l])
continue;
for (int j : v[l-1])
if ((i&j)==j)
{
v[l].push_back(i);
break;
}
}
if (v[n].empty())
cout<<"NO";
else
cout<<"YES";
return 0;
}
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