#include<iostream> using namespace std; int main() { int N; cin>>N; int a,b; int s = 0; int d = 0; for(int i = 0;i <= N;i++){ cin>>a>>b; if(i == 1){ s = a+b; cout<<s; }else if(i == 2){ d = a+ b; cout<<d; } } return 0; }