Submission #435162

#	Time	Username	Problem	Language	Result	Execution time	Memory
435162		Apiram	Werewolf (IOI18_werewolf)	C++14	0 / 100	4065 ms	51276 KiB

werewolf

#include<bits/stdc++.h>
#include "werewolf.h"
using namespace std;
vector<vector<int>>adj(2e5 + 5);
bool ok;
vector<vector<bool>>visited(2e5 + 5,vector<bool>(2,false));
void dfs (int s,int bot,int l,int r,int e){
	if (ok)return;
	if (s==e&&bot==1){
		ok=true;
		return;
	}
	else if (s==e)return;
	visited[s][bot]=true;
	for (auto x:adj[s]){
			if (bot==0&&x>=r&&!visited[x][bot]){
				dfs(x,bot,l,r,e);
			}
			else if (bot==1&&x<=l&&!visited[x][bot]){
				dfs(x,bot,l,r,e);
			}
			else if (x>l&&x<r){
				if (!visited[x][bot^1])
				dfs(x,bot^1,l,r,e);
				if (!visited[x][bot])
				dfs(x,bot,l,r,e);
			}
	}
}
std::vector<int> check_validity(int N, std::vector<int> X, std::vector<int> Y,
                                std::vector<int> s, std::vector<int> E,
                                std::vector<int> L, std::vector<int> R) {
  vector<int>A(E.size());
  for (int i  =0;i<X.size();++i){
  	adj[X[i]].push_back(Y[i]);
  	adj[Y[i]].push_back(X[i]);
  }
  //0 - human
  //1 - wolf
	for (int i  =0;i<E.size();++i){
  	ok=false;
	  for (int j =0;j<=N;++j){
	  	visited[j][0]=false;
	  	visited[j][1]=false;
	  }
  	if (s[i]>=L[i]&&s[i]<=R[i]){
  		dfs(s[i],0,L[i]-1,R[i]+1,E[i]);
  		dfs(s[i],1,L[i]-1,R[i]+1,E[i]);
  	}
  	else 
  	dfs(s[i],0,L[i]-1,R[i]+1,E[i]);
  	A[i]=ok;
  	ok=false;
	  for (int j =0;j<=N;++j){
	  	visited[j][0]=false;
	  	visited[j][1]=false;
	  }
  	if (E[i]>=L[i]&&E[i]<=R[i]){
  		dfs(E[i],0,L[i]-1,R[i]+1,E[i]);
  		dfs(E[i],1,L[i]-1,R[i]+1,E[i]);
  	}
  	else 
  	dfs(E[i],0,L[i]-1,R[i]+1,E[i]);
  	A[i]|=A[i]&ok;
	}
  return A;
}

Compilation message (stderr)

werewolf.cpp: In function 'std::vector<int> check_validity(int, std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>)':
werewolf.cpp:34:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   34 |   for (int i  =0;i<X.size();++i){
      |                  ~^~~~~~~~~
werewolf.cpp:40:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   40 |  for (int i  =0;i<E.size();++i){
      |                 ~^~~~~~~~~

• Subtask 1: 0 / 7
• Subtask 2: 0 / 8
• Subtask 3: 0 / 34
• Subtask 4: 0 / 51