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 a[21],b[21],n,m;
void dfs(int x,int sum,int state,int k,int num)
{
int i;
if(x>n)
{
cout<<"YES";
exit(0);
}
if(sum==0)
{
dfs(x+1,a[x+1],state,0,num);
return;
}
for(i=k+1;i<m;i++)
{
if(m-num-1<n-x) break;
if(state&(1<<i) || sum<b[i]) continue;
dfs(x,sum-b[i],state+(1<<i),i,num+1);
}
}
int main()
{
cin>>n>>m;
for(int i=1;i<=n;i++)
{
cin>>a[i];
}
for(int i=1;i<=m;i++)
{
cin>>b[i];
}
dfs(1,a[1],0,0,0);
cout<<"NO";
return 0;
}
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