Submission #428625

#	Time	Username	Problem	Language	Result	Execution time	Memory
428625		vanic	Toy Train (IOI17_train)	C++14	15 / 100	2053 ms	1316 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;
vector < int > put;

int dfs(int x){
	if(bio[x]){
		bool p=0;
		for(int i=0; i<put.size(); i++){
			if(put[i]==x){
				p=1;
			}
			if(p){
				if(charge[put[i]]){
					return 1;
				}
			}
		}
		return 0;
	}
	put.push_back(x);
	bio[x]=1;
	for(int i=0; i<ms[x].size(); i++){
		if(dfs(ms[x][i])==tko[x]){
			bio[x]=0;
			put.pop_back();
			return tko[x];
		}
	}
	bio[x]=0;
	put.pop_back();
	return !tko[x];
}

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++){
		sol[i]=dfs(i);
	}
	
	return sol;
}

Compilation message (stderr)

train.cpp: In function 'int dfs(int)':
train.cpp:22:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   22 |   for(int i=0; i<put.size(); i++){
      |                ~^~~~~~~~~~~
train.cpp:36:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   36 |  for(int i=0; i<ms[x].size(); i++){
      |               ~^~~~~~~~~~~~~

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