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);
vector<vector<int>>adj(n);
for (int i = 0;i<m;++i){
adj[u[i]].push_back(v[i]);
}
vector<bool>visited(n,false);
vector<int>cnt(n,0);
function<int(int,int)>dfs = [&](int u,int got){
if (visited[u]){
if (got)return 1;
return 0;
}
int ans = 0;
for (auto x:adj[u]){
ans|=dfs(x,(got|(r[x] == 1)));
}
return cnt[u] = ans;
};
for (int i = 0;i<n;++i){
if (visited[i]){
ans[i] = cnt[i];
}
else{
ans[i] = dfs(i,r[i]);
}
}
return ans;
}
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