#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
const ll MOD = 1e9 + 7;
const int MAXN = 5e5 + 5;
int x[MAXN] , y[MAXN];
int n;
int updateX(int pos,int val)
{
x[pos] = val;
ll ans = 0;
ll profit = 0;
ll horses = 1;
for(int i = 0 ; i < n ; i++)
{
horses = (horses * x[i]);
horses%=MOD;
profit = (horses * y[i]) % MOD;
profit%=MOD;
ans = max(ans , profit);
}
return (int)ans;
}
int updateY(int pos,int val)
{
y[pos] = val;
ll ans = 0;
ll profit = 0;
ll horses = 1;
for(int i = 0 ; i < n ; i++)
{
horses = (horses * x[i]);
horses%=MOD;
profit = (horses * y[i]) % MOD;
profit%=MOD;
ans = max(ans , profit);
}
return (int)ans;
}
int init(int N , int X[] , int Y[])
{
n = N;
ll ans = 0;
ll profit = 0;
ll horses = 1;
for(int i = 0 ; i < n ; i++)
{
x[i] = X[i];
y[i] = Y[i];
}
for(int i = 0 ; i < n ; i++)
{
horses = (horses * x[i]);
horses%=MOD;
profit = (horses * y[i]) % MOD;
profit%=MOD;
ans = max(ans , profit);
}
return (int)ans;
}
