This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include "train.h"
#include <bits/stdc++.h>
#define rep(i, n) for (int i = 0; i < (int)(n); ++i)
#define rep2(i, a, b) for (int i = (int)(a); i < (int)(b); ++i)
#define rrep(i, n) for (int i = (int)(n) - 1; i >= 0; --i)
#define rrep2(i, a, b) for (int i = (int)(b) - 1; i >= (int)(a); --i)
#define all(v) begin(v), end(v)
using namespace std;
template<class T, class U> bool chmin(T& a, const U& b) { return a > b ? a = b, true : false; }
template<class T, class U> bool chmax(T& a, const U& b) { return a < b ? a = b, true : false; }
using ll = long long;
std::vector<int> who_wins(std::vector<int> a, std::vector<int> r, std::vector<int> u, std::vector<int> v) {
int n = a.size(), m = u.size();
queue<int> que;
vector<vector<int>> g(n), rg(n);
rep (i, m) {
g[u[i]].push_back(v[i]);
rg[v[i]].push_back(u[i]);
}
vector<int> cmp(n, -1);
{
vector<int> ord, used(n);
auto dfs = [&](auto self, int v) -> void {
used[v] = true;
for (int u : g[v]) {
if (!used[u]) self(self, u);
}
ord.push_back(v);
};
rep (i, n) if (!used[i]) dfs(dfs, i);
reverse(all(ord));
int k = 0;
auto rdfs = [&](auto self, int v) -> void {
cmp[v] = k;
for (int u : rg[v]) {
if (cmp[u] == -1) self(self, u);
}
};
for (int i : ord) {
if (!cmp[i]) rdfs(rdfs, i), ++k;
}
}
{
vector<bool> memo(n);
queue<int> que;
rep (i, n) {
if (a[i] == 0) {
for (int j : g[i]) {
if (cmp[i] != cmp[j]) {
memo[i] = true;
que.push(i);
break;
}
}
}
else {
memo[i] = true;
for (int j : g[i]) {
if (cmp[i] == cmp[j]) {
memo[i] = false;
break;
}
}
if (memo[i]) que.push(i);
}
}
vector<int> deg(n);
rep (i, n) {
if (cmp[u[i]] == cmp[v[i]]) ++deg[u[i]];
}
while (!que.empty()) {
int v = que.front(); que.pop();
for (int u : rg[v]) {
if (cmp[u] != cmp[v]) continue;
if (memo[u]) continue;
if (a[u] == 0 || (--deg[u]) == 0) {
memo[u] = true;
que.push(u);
}
}
}
rep (i, n) {
if (memo[i]) r[i] = 0;
}
}
{
queue<int> que;
rep (i, n) {
if (r[i] == 1) que.push(i);
}
vector<int> deg(n);
rep (i, n) ++deg[u[i]];
while (!que.empty()) {
int v = que.front(); que.pop();
for (int u : rg[v]) {
if (r[u]) continue;
if (a[u] == 1 || (--deg[u]) == 0) {
r[u] = true;
que.push(u);
}
}
}
}
return r;
}
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