#include "horses.h"
#include<bits/stdc++.h>
using namespace std;
#define ll __int128
ll m = 1000000009;
int n;
vector<int> x, y;
int solve(){
ll cur = 1, cy, cx, bsf;
for (int i=0; i<n; i++){
if (i == 0){
cur = (cur*x[i]) % m;
cy = y[i];
cx = 1;
bsf = (cur*y[i]) % m;
continue;
}
cur = (cur*x[i]) % m;
cx *= x[i];
if (cx * y[i] > cy){
bsf = (cur*y[i]) % m;
cy = y[i];
cx = x[i];
}
}
return bsf;
}
int init(int N, int X[], int Y[]){
n = N;
x.resize(n);
y.resize(n);
for (int i=0; i<n; i++){
x[i] = X[i];
y[i] = Y[i];
}
return solve();
}
int updateX(int pos, int val){
x[pos] = val;
return solve();
}
int updateY(int pos, int val){
y[pos] = val;
return solve();
}
