#include <bits/stdc++.h>
#include "circuit.h"
using namespace std;
const int MXN = 2e5 + 5;
const int mod = 1e9 + 2022;
int n, m;
vector<int> A;
vector<int> adj[MXN];
int dp[2][MXN];
void dfs(int a)
{
dp[0][a] = dp[1][a] = 0;
if (adj[a].empty())
{
dp[0][a] = A[a] ^ 1;
dp[1][a] = A[a];
return;
}
int sz = adj[a].size();
vector<int> dp1(sz + 1, 0);
dp1[0] = 1;
for (int &v : adj[a])
{
dfs(v);
for (int i = sz; i >= 0; i--)
{
dp1[i] = (dp1[i] * dp[0][v]) % mod;
dp1[i] = (dp1[i] + ((dp1[i - 1] * dp[1][v]) % mod)) % mod;
}
}
for (int i = 0; i <= sz; i++)
{
dp[0][a] = (dp[0][a] + (sz - i) * dp1[i]);
dp[1][a] = (dp[1][a] + i * dp1[i]);
}
}
void init(int N, int M, vector<int> P, vector<int> AA)
{
A = AA;
reverse(A.begin(), A.end());
A.resize(N + M, 0);
reverse(A.begin(), A.end());
for (int i = 1; i < N + M; i++) adj[P[i]].push_back(i);
}
int count_ways(int L, int R) {
for (int i = L; i <= R; i++) A[i] ^= 1;
dfs(0);
return dp[1][0];
}
