Submission #805979

#	Time	Username	Problem	Language	Result	Execution time	Memory
805979		LIF	Werewolf (IOI18_werewolf)	C++14	34 / 100	692 ms	81088 KiB

werewolf

#include "werewolf.h"
#include<vector>
#include<bits/stdc++.h>
#include<queue>
using namespace std;
int pos[300005];
int ind[300005];
int id[300005];
int val[300005];
vector<int> ans;
vector<int> vv[300005];
int stmin[200005][23];
int stmax[200005][23];
bool vis[300005];
void dfs(int now,int num)
{
	//cout<<now<<" "<<num<<endl;
	vis[now] = true;
	id[now] = num;
	val[num] = now;
	for(int i=0;i<vv[now].size();i++)
	{
		int to = vv[now][i];
		if(vis[to] == false)dfs(to,num+1);
	}
	return;
}
int checkmin(int x,int y)
{
	int len = log(y-x+1) / log(2);
	return min(stmin[x][len],stmin[y-(1<<(len))+1][len]); 
}
int checkmax(int x,int y)
{
	int len = log(y-x+1) / log(2);
	return max(stmax[x][len],stmax[y-(1<<(len))+1][len]);
}
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)
{
	for(int i=0;i<X.size();i++)
	{
		ind[X[i]]++;ind[Y[i]]++;
		vv[X[i]].push_back(Y[i]);
		vv[Y[i]].push_back(X[i]);
	}
	//cout<<"yeah"<<endl;
	for(int i=0;i<N;i++)
	{
		if(ind[i] != 1)continue;
		dfs(i,0);
		break;
	}
	for(int i=0;i<N;i++)
	{
		stmin[i][0] = val[i];
		stmax[i][0] = val[i];
	}
	for(int i=1;i<=20;i++)
	{
		for(int j=0;j+ (1<<i) - 1< N;j++)
		{
			stmin[j][i] = min(stmin[j][i-1],stmin[j+(1<<(i-1))][i-1]);
			stmax[j][i] = max(stmax[j][i-1],stmax[j+(1<<(i-1))][i-1]);
		}
	}
	/*for(int i=0;i<N;i++)cout<<i<<" ";
	cout<<endl;;
	for(int i=0;i<N;i++)cout<<id[i]<<" ";
	cout<<endl;
	for(int i=0;i<N;i++)cout<<val[i]<<" ";
	cout<<endl;*/
//	cout<<checkmax(1,5)<<endl;
	for(int i=0;i<S.size();i++)
	{
		int xx = id[S[i]];
		int yy = id[E[i]];
		if(xx < yy)
		{
			int ll = xx;int rr = yy;
			int last1 = xx;
			int last2 = yy;
			while(ll <= rr)
			{
				int mid = (ll+rr)>>1;
				if(checkmin(xx,mid) >= L[i])
				{
					last1 = mid;
					ll = mid + 1;
				}
				else rr = mid - 1;
			}
			ll = xx;rr = yy;
			while(ll <= rr)
			{
				int mid = (ll+rr)>>1;
				if(checkmax(mid,yy) <= R[i])
				{
					last2 = mid;
					rr = mid - 1;
				}
				else ll = mid+1;
			}
			if(last1 >= last2)ans.push_back(1);
			else ans.push_back(0);
	//		cout<<last1<<" "<<last2<<endl;
		}
		else
		{
			swap(xx,yy);
			int ll = xx;int rr = yy;
			int last1 = xx;
			int last2 = yy;
			while(ll <= rr)
			{
				int mid = (ll+rr)>>1;
				if(checkmax(xx,mid) <= R[i])
				{
					last1 = mid;
					ll = mid + 1;
				}
				else rr = mid - 1;
			}
			ll = xx;rr = yy;
			while(ll <= rr)
			{
				int mid = (ll+rr)>>1;
				if(checkmin(mid,yy) >= L[i])
				{
					last2 = mid;
					rr = mid - 1;
				}
				else ll = mid+1;
			}
			if(last1 >= last2)ans.push_back(1);
			else ans.push_back(0);
		}
	}
	return ans;
}

Compilation message (stderr)

werewolf.cpp: In function 'void dfs(int, int)':
werewolf.cpp:21:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   21 |  for(int i=0;i<vv[now].size();i++)
      |              ~^~~~~~~~~~~~~~~
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:42:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   42 |  for(int i=0;i<X.size();i++)
      |              ~^~~~~~~~~
werewolf.cpp:75:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   75 |  for(int i=0;i<S.size();i++)
      |              ~^~~~~~~~~

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