#include <bits/stdc++.h>
using namespace std;
using ld = long double;


int main(){
    cin.tie(nullptr);
    ios::sync_with_stdio(false);
    int k;
    cin >> k;
    vector<pair<int, int>> N(k);
    ld lgN = 0;
    for(auto& [p, e] : N){
        cin >> p >> e;
        lgN += logl(p) * e;
    }
    const int P = N.back().first;
    ld lg = 0, err = INFINITY;
    int R;
    for(int i = 0; i < P / 2; i++){
        lg += logl(P - i) - logl(i + 1);
        if(err > abs(lgN - lg)){
            err = abs(lgN - lg);
            R = i + 1;
        }
    }
    for(auto [p, e] : N){
        auto f = [p = p](int x){
            int ans = 0;
            while(1){
                x /= p;
                if(x == 0) return ans;
                ans += x;
            }
        };
        if(e != f(P) - f(R) - f(P - R)){
            cout << "-1 -1" << endl;
            return 0;
        }
    }
    cout << P << ' ' << R << endl;
}