This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#define _USE_MATH_DEFINES
#include <bits/stdc++.h>
#define ff first
#define ss second
#define pb push_back
#define all(a) (a).begin(), (a).end()
#define replr(i, a, b) for (int i = int(a); i <= int(b); ++i)
#define reprl(i, a, b) for (int i = int(a); i >= int(b); --i)
#define rep(i, n) for (int i = 0; i < int(n); ++i)
#define mkp(a, b) make_pair(a, b)
using namespace std;
typedef long long ll;
typedef long double ld;
typedef pair<int, int> PII;
typedef vector<int> VI;
typedef vector<PII> VPI;
typedef vector<VI> VVI;
typedef vector<VVI> VVVI;
typedef vector<VPI> VVPI;
typedef pair<ll, ll> PLL;
typedef vector<ll> VL;
typedef vector<PLL> VPL;
typedef vector<VL> VVL;
typedef vector<VVL> VVVL;
typedef vector<VPL> VVPL;
template<class T> T setmax(T& a, T b) {if (a < b) return a = b; return a;}
template<class T> T setmin(T& a, T b) {if (a < b) return a; return a = b;}
#include <ext/pb_ds/assoc_container.hpp>
using namespace __gnu_pbds;
template<class T>
using indset = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
#include "circuit.h"
const ll MOD = 1000002022;
bool test1;
int n;
VVI gp;
VI val;
void init(int N, int M, VI P, VI A) {
test1 = (N == 1);
n = N + M;
gp = VVI(n);
rep(u, n) if (u) gp[P[u]].pb(u);
val = VI(n);
rep(u, M) val[u+N] = A[u];
}
VL dpa; // sev
VL dpb; // lriv
void dfs(int u = 0, int p = -1) {
if (gp[u].size() == 0) {
if (val[u]) dpa[u] = 1;
else dpa[u] = 0;
dpb[u] = 1;
return;
}
VL a;
VL b;
for (int v : gp[u]) if (v != p) {
dfs(v);
a.pb(dpa[v]);
b.pb(dpb[v]);
}
dpb[u] = gp[u].size();
for (ll x : b) {
dpb[u] *= x;
dpb[u] %= MOD;
}
if (a.size() == 1) {
dpa[u] = dpa[u];
} else {
dpa[u] = 0;
dpa[u] += a[0] * max(0ll, b[1]-a[1]) % MOD;
dpa[u] %= MOD;
dpa[u] += max(0ll, b[0]-a[0]) * a[1] % MOD;
dpa[u] %= MOD;
dpa[u] += a[0] * a[1] % MOD;
dpa[u] %= MOD;
dpa[u] += a[0] * a[1] % MOD;
dpa[u] %= MOD;
}
}
int count_ways(int L, int R) {
replr(i, L, R) val[i] = !val[i];
if (test1) {
int sum = 0;
for (int x : val) sum += x;
return sum;
}
dpa = dpb = VL(n);
dfs();
/*rep(u, n) {*/
/* cout << u << ": " << dpa[u] << endl;*/
/*}*/
return dpa[0];
}
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