제출 #584677

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
584677		1ne	장난감 기차 (IOI17_train)	C++14	0 / 100	6 ms	1108 KiB

train

#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,0);
	vector<int>cnt(n,0);
	vector<int>parent(n,-1);
	for (int i = 0;i<n;++i){
		function<int(int)>dfs = [&](int u){
			if (visited[u]){
				int x = u;
				int got = 0;
				while(parent[x]!=u){
					got|=r[x];
					x = parent[x];
				}
				return got;
			}
			int ans = 0;
			for (auto x:adj[u]){
				parent[x] = u;
				ans|=dfs(x);
			}
			return cnt[u] = ans;
		};
		if (visited[i] != -1){
			ans[i] = cnt[i];
		}
		else{
			ans[i] = dfs(i);
		}
	}
	return ans;
}

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• Subtask 6: 0 / 51