I use binary array. Where is wrong?

long n,m,i,k;
long p[65539];
int Ok=0;
cin>>n;
for(i=0;i<65539;i++){p[i]=0;}
for(i=0;i<n;i++){cin>>k; p[k+32768]=1;}
cin>>m;
for(i=0;i<m&&!Ok;i++){cin>>k; if (p[42768-k]){Ok=1;}}
if (Ok) {cout<<"YES";}
else {cout<<"NO";}