Submission #425870

#	Time	Username	Problem	Language	Result	Execution time	Memory
425870		Hazem	Toy Train (IOI17_train)	C++14	0 / 100	7 ms	1356 KiB

train

#include "train.h"
#include <bits/stdc++.h>

using namespace std;
const int N = 2e3+10;

vector<int>adj[N],R,A;
set<int>st;
int cnt[N];
int n,m;
bool vis[N];

bool dfs(int i,int pre){

	if(vis[i])
		return 0;

	st.insert(i);
	vis[i] = 1;
	cnt[i] += cnt[pre]+R[i];
	bool ret = 0;
	for(auto x:adj[i]){
		ret |= dfs(x,i);
		if(st.find(x)==st.end())
			continue;
		if(cnt[i]-cnt[x]+R[x]>0)ret = 1;
	}
	st.erase(i);
	return ret;
}

vector<int>ans;
std::vector<int> who_wins(std::vector<int> a, std::vector<int> r, std::vector<int> u, std::vector<int> v) {

	n = a.size(),m = u.size();
	A = a;R = r;
	for(int i=0;i<m;i++)
		adj[u[i]].push_back(v[i]);
	
	for(int i=0;i<n;i++){
		ans.push_back(dfs(i,n+1));
		memset(vis,0,sizeof(vis));
		memset(cnt,0,sizeof(cnt));
	}
	return ans;
}

• Subtask 1: 0 / 5
• Subtask 2: 0 / 10
• Subtask 3: 0 / 11
• Subtask 4: 0 / 11
• Subtask 5: 0 / 12
• Subtask 6: 0 / 51