Submission #434979

#	Time	Username	Problem	Language	Result	Execution time	Memory
434979		Apiram	Werewolf (IOI18_werewolf)	C++14	0 / 100	4046 ms	524292 KiB

werewolf

#include "werewolf.h"
#include<bits/stdc++.h>
using namespace std;
vector<vector<int>>adj(2e5);
bool ok;
void dfs (int s,int par,int bot,int l,int r,int cnts,int counts){
	if (ok)return;
	if (cnts==counts){
		ok=true;
		return;
	}
	for (auto x:adj[s]){
		if (x!=par){
			if (bot==1&&x>=r){
				dfs(x,s,bot,l,r,cnts+1,counts);
			}
			else if (bot==0&&x<=l){
				dfs(x,s,bot,l,r,cnts+1,counts);
			}
			else if (x>l&&x<r){
				dfs(x,s,bot^1,l,r,cnts,counts);
				dfs(x,s,bot,l,r,cnts,counts);
			}
		}
	}
}
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<N;++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;
  	int counts = N - (R[i]-L[i]);
  	int bot = 0;
  	if (s[i]<L[i]){
  		bot = 1;
  	}
  	else if (s[i]>=L[i]&&s[i]<R[i]){
  		bot = 2;
  	}
  	if (bot == 1||bot==0){
  		dfs(s[i],-1,bot,L[i]-1,R[i],0,counts);
  	}
  	else {
  		dfs(s[i],-1,bot,L[i]-1,R[i],0,counts);
  		dfs(s[i],-1,bot^1,L[i]-1,R[i],0,counts);
  	}
  	A[i]=ok;
	}
	for (int i  =0;i<E.size();++i){
  	ok=false;
  	int counts = N - (R[i]-L[i]);
  	int bot = 0;
  	if (E[i]<L[i]){
  		bot = 1;
  	}
  	else if (E[i]>=L[i]&&E[i]<R[i]){
  		bot = 2;
  	}
  	if (bot == 1||bot==0){
  		dfs(E[i],-1,bot,L[i]-1,R[i],0,counts);
  	}
  	else {
  		dfs(E[i],-1,bot,L[i]-1,R[i],0,counts);
  		dfs(E[i],-1,bot^1,L[i]-1,R[i],0,counts);
  	}
  	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:38:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   38 |   for (int i  =0;i<E.size();++i){
      |                  ~^~~~~~~~~
werewolf.cpp:57:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   57 |  for (int i  =0;i<E.size();++i){
      |                 ~^~~~~~~~~

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