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>
using namespace std;
std::vector<int> who_wins(std::vector<int> a, std::vector<int> r, std::vector<int> u, std::vector<int> v) {
int n = (int)a.size();
int m = (int)u.size();
vector<int>ans(n,0);
vector<vector<int>>adj(n),adj2(n);
for (int i = 0;i<m;++i){
adj[u[i]].push_back(v[i]);
adj2[v[i]].push_back(u[i]);
}
vector<bool>visited(n,false),visited2(n,false);
function<void(int)>dfs = [&](int u){
visited[u] = true;
for (auto x:adj[u]){
if (!visited[x])dfs(x);
}
};
function<void(int)>dfs2 = [&](int u){
visited2[u] = true;
for (auto x:adj2[u]){
if (!visited2[x])dfs2(x);
}
};
for (int i = 0;i<n;++i){
for (int j = 0;j<n;++j){
visited[i] = false;
visited2[i] = false;
}
for (auto x:adj[i])dfs(x);
for (auto x:adj2[i])dfs2(x);
if (visited[i]){
for (int j = 0;j<n;++j){
ans[j] |=visited2[j];
}
}
}
return ans;
}
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