Submission #134873

#	Time	Username	Problem	Language	Result	Execution time	Memory
134873		amiratou	Toy Train (IOI17_train)	C++14	0 / 100	1450 ms	1424 KiB

train

#include "train.h"
#include <bits/stdc++.h>
using namespace std;

vector<int> A,R;
int n;
vector<vector<int> > vec;
int vis[5001];
int dfs(int node,int e,int charge){
	if(R[node])e=n,charge=1;
	//cerr<<node<<" "<<e<<"\n";
	if(!e)return 0;
	if(vis[node]!=-1){
		if(charge)return 1;
		else return 0;
	}
	vis[node]=e;
	for(auto child:vec[node]){
		int ans=dfs(child,e-1,charge);
		if(A[node]&&ans==1)return 1;
		if(!A[node]&&ans==0)return 0;
	}
	return !A[node];
}


vector<int> who_wins(vector<int> a, vector<int> r, vector<int> u, vector<int> v) {
	//cerr<<"\n----------\n";
	A=a,R=r;
	n=a.size();
	vec.resize(a.size());
	for (int i = 0; i < u.size(); ++i)
		vec[u[i]].push_back(v[i]);
	vector<int> res(n);
	for (int i = 0; i < n; ++i){
		
		memset(vis,-1,sizeof vis);
		res[i]=dfs(i,n,0);
		//cerr<<"\n----------\n";
	}
	return res;
}

Compilation message (stderr)

train.cpp: In function 'std::vector<int> who_wins(std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>)':
train.cpp:32:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (int i = 0; i < u.size(); ++i)
                  ~~^~~~~~~~~~

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