#include <iostream>
#include <algorithm>
#include <cmath>
using namespace std;
#define REP(a,i,n) for (ll i=a;i<n;i++)
#define ll long long
#define ssize 500'000
const ll MOD = 1e9+7;
int N;
ll X[ssize], Y[ssize];
ll solve() {
//ll mx=0, hNum=1;
long double emx = 0, hiNum=0;
REP(0,i,N) {
hiNum += log10(X[i]);
emx = max(emx, hiNum+log10(Y[i]));
}
return pow(10, emx);
}
ll init(int n, int x[], int y[]) {
N = n;
REP(0,i,n) {
X[i] = x[i];
Y[i] = y[i];
}
return solve();
}
ll updateX(int pos, int val) {
X[pos] = val;
return solve();
}
ll updateY(int pos, int val) {
Y[pos] = val;
return solve();
}
