# include<stdio.h> # include<iostream> using namespace std; int main(){ int a[100] = {0} , b[100] = {0}; int n; cin >>n; for(int i=1;i<=n;i++){ cin>>a[i]; } for(int i=1;i<=n;i++){ cin>>b[i]; } int s = 0; for(int i=1;i<=n;i++){ s+=a[i]*b[i]; } cout<<s; return 0; }