#include "horses.h"
#include <bits/stdc++.h>
using namespace std;
#define ll long long
const ll MOD = 1e9+7;
const ll MAXV = 1e9;
const int MN = 5e5+5;
int n;
vector<int> x, y;
int get_ans() {
ll dp = y[n-1];
int idx = n-1;
for (int i = n-2; i >= 0; i--) {
ll dp2 = max((ll)y[i], (ll)x[i + 1] * dp);
if (dp2 > MAXV) break;
dp = dp2;
idx = i;
}
ll b4 = 1;
for (int i = 0; i <= idx; i++) {
b4 *= x[i];
b4 %= MOD;
}
dp %= MOD;
return (b4 * dp) % MOD;
}
int init(int N, int X[], int Y[]) {
n = N;
for (int i = 0; i < n; i++) {
x.push_back(X[i]);
y.push_back(Y[i]);
}
return get_ans();
}
int updateX(int pos, int val) {
x[pos] = val;
return get_ans();
}
int updateY(int pos, int val) {
y[pos] = val;
return get_ans();
}
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