Problems
Binary search - 1
include<bits/stdc++.h>
using namespace std; int main(){ int n,q; int x; cin>>n>>q; int a[n]; for(int i=0;i<n;i++){ cin>>a[i];
}
while(q--){
cin>>x;
auto up=upper_bound(a, a+n, x);
auto lo=lower_bound(a, a+n, x);
cout<<up-lo<<endl;
}
}