#include using namespace std; int main(){ int n; cin>>n; vector a(n),b(n),c(101,0); for(int i=0;i>a[i]; for(int i=0;i>b[i]; for(int i=0;i0)c[b[i]]+=a[i]; else c.front()+=a[i]; } puts(c.begin()==max_element(c.begin(),c.end())?"YES":"NO"); }