Submission #775966

#	Time	Username	Problem	Language	Result	Execution time	Memory
775966		peteza	Toy Train (IOI17_train)	C++14	0 / 100	382 ms	50560 KiB

train

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

vector<int> adj[5005], tran[5005];
bool reach[5005][5005], reachtran[5005][5005];
bool vis[5005];

int st;

void dfs(int x, vector<int> *vec, bool trans) {
	if(vis[x]) return;
	vis[x] = 1;
	if(trans) reachtran[st][x] = 1;
	else reach[st][x] = 1;
	for(int e:vec[x]) 
		dfs(e, vec, trans);
}

std::vector<int> who_wins(std::vector<int> a, std::vector<int> r, std::vector<int> u, std::vector<int> v) {
	std::vector<int> res(a.size());
	for(int i=0;i<u.size();i++)
		adj[u[i]].push_back(v[i]),
		tran[v[i]].push_back(u[i]);
	if(a[0] == 1) { // arezou (sub 3), find cyc with charging station
		for(st=0;st<a.size();st++) {
			memset(vis, 0,sizeof vis); dfs(st, adj, 0);
			memset(vis, 0,sizeof vis); dfs(st, tran, 1);
		}
		for(int i=0;i<a.size();i++) {
			if(r[i]) {
				bool yas = 0;
				for(int k=0;k<a.size();k++) {
					if(i != k && reach[i][k] && reachtran[k][i]) {
						yas = 1;
						break;
					}
				}
				res[i] = yas;
			} else {
				bool yas = 0;
				for(int k=0;k<a.size();k++) {
					if(i != k && reach[i][k] && reachtran[k][i] && r[k]) {
						yas = 1;
						break;
					}
				}
				res[i] = yas;			
			}

		}
	} else { //        borzou (sub 4), find cyc with NO charging station
  
	}
	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:22:15: 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<u.size();i++)
      |              ~^~~~~~~~~
train.cpp:26:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   26 |   for(st=0;st<a.size();st++) {
      |            ~~^~~~~~~~~
train.cpp:30:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   30 |   for(int i=0;i<a.size();i++) {
      |               ~^~~~~~~~~
train.cpp:33:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   33 |     for(int k=0;k<a.size();k++) {
      |                 ~^~~~~~~~~
train.cpp:42:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   42 |     for(int k=0;k<a.size();k++) {
      |                 ~^~~~~~~~~

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