#include<bits/stdc++.h>
#define ll long long
#define ff first
#define ss second
#define mxn 500002
#define pb push_back
#define yes cout<<"YES"<<endl
#define no cout<<"NO"<<endl
using namespace std;
ll n,x[mxn],y[mxn],mod=1e9+7,p[mxn];
ll max_profit(){
ll mx=0;
for(int i=0;i<n;i++){
ll c=(p[i]*y[i])%mod;
if(c>mx){
mx=c;
}
}
return mx;
}
int init(int n, int X[], int Y[]){
for(int i=0;i<n;i++){
x[i]=X[i];
y[i]=Y[i];
}
p[0]=x[0]%mod;
for(int i=1;i<n;i++){
p[i]=p[i-1]*x[i];
p[i]%=mod;
}
return (int)max_profit();
}
int updateX(int pos, int val){
x[pos]=val;
return (int) max_profit();
}
int updateY(int pos, int val){
y[pos]=val;
return (int) max_profit();
}
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