Submission #428573

#	Time	Username	Problem	Language	Result	Execution time	Memory
428573		vanic	Toy Train (IOI17_train)	C++14	5 / 100	11 ms	1324 KiB

train

#include "train.h"
#include <iostream>
#include <vector>
#include <algorithm>
#include <cmath>

using namespace std;

const int maxn=5005;

int n, m;
vector < int > ms[maxn];
int charge[maxn];
bool tko[maxn];
bool bio[maxn];
vector < int > sol;


int dfs(int x){
	if(bio[x]){
		return sol[x];
	}
	bio[x]=1;
	if(find(ms[x].begin(), ms[x].end(), x)!=ms[x].end()){
		if(tko[x]==charge[x]){
			return sol[x]=charge[x];
		}
		if(ms[x].size()==1){
			return sol[x]=charge[x];
		}
		if(ms[x][0]==x){
			swap(ms[x][0], ms[x][1]);
		}
	}
	return sol[x]=dfs(ms[x][0]);
}

vector < int > who_wins(vector < int > a, vector < int > r, vector < int > u, vector < int > v) {
	n=a.size();
	m=u.size();
	for(int i=0; i<n; i++){
		tko[i]=a[i];
		charge[i]=r[i];
	}
	for(int i=0; i<m; i++){
		ms[u[i]].push_back(v[i]);
	}
	sol.resize(n, 0);
	for(int i=0; i<n; i++){
		if(!bio[i]){
			dfs(i);
		}
	}
	
	return sol;
}

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