#include <bits/stdc++.h>
using namespace std;
using ll = long long;
int main() {
ll n,m;
cin>>n>>m;
ll a[n+1],b[m+1];
for(ll i=1;i<=n;i++) {
cin>>a[i];
}
for(ll i=1;i<=m;i++) {
cin>>b[i];
}
bool ok=1;
for(ll i=1;i<=n;i++) {
ll sum=0;
for(ll j=1;j<=n;j++) {
sum+=a[j];
if(sum!=a[i]) sum=a[j];
}
if(sum!=a[i]) ok=0;
}
cout<<(ok ? "YES" : "NO");
}
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