oj.uz

Submission #342725

# Submission time Handle Problem Language Result Execution time Memory
342725 2021-01-02T16:55:30 Z ogibogi2004 Trampoline (info1cup20_trampoline) C++14
54 / 100
 1996 ms 78748 KB 
#include<bits/stdc++.h>
using namespace std;
#define x1 sdfds
#define y1 sdfdfds
#define x2 sdffdsds
#define y2 sdfdds
const int MAXN=2e5+6;
struct trampoline
{
	int x,y;
	bool operator<(trampoline const& other)const
	{
		return make_pair(x,y)<make_pair(other.x,other.y);
	}
};
set<int>xs;
int n,m,k;
vector<trampoline>tr;
map<int,int> newx;
vector<int>xs1;
set<int>ys[MAXN];
vector<int>g[MAXN];
int dp[MAXN][18];
map<pair<int,int>,int> no;
bool vis[MAXN];
int not_root[MAXN];
void dfs(int u,int par)
{
	dp[u][0]=par;
	vis[u]=1;
	for(auto v:g[u])
	{
		if(vis[v])continue;
		dfs(v,u);
	}
}
void precompute()
{
	for(int j=1;j<18;j++)
	{
		for(int i=0;i<tr.size();i++)
		{
			if(dp[i][j-1]==-1)dp[i][j]=-1;
			else dp[i][j]=dp[dp[i][j-1]][j-1];
		}
	}
}
int main()
{
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	cout.tie(NULL);
	cin>>n>>m>>k;
	for(int i=0;i<k;++i)
	{
		int x,y;
		cin>>x>>y;
		xs.insert(x);
		tr.push_back({x,y});
	}
	int cnt=0;
	for(auto xd:xs)
	{
		newx[xd]=++cnt;
		xs1.push_back(xd);
	}
	for(int i=0;i<tr.size();++i)
	{
		ys[newx[tr[i].x]].insert(tr[i].y);
		no[{newx[tr[i].x],tr[i].y}]=i;
	}
	for(int i=0;i<tr.size();++i)
	{
		if(!newx.count(tr[i].x+1))
		{
			continue;
		}
		int x1=newx[tr[i].x+1];
		auto xd=ys[x1].lower_bound(tr[i].y);
		if(xd==ys[x1].end())continue;
		int nxt=no[{x1,(*xd)}];
		//cout<<"da\n";
		g[nxt].push_back(i);
		//cout<<tr[i].x<<" "<<tr[i].y<<" "<<x1<<" "<<(*xd)<<endl;
		//cout<<"* "<<nxt<<"->"<<i<<endl;
		not_root[i]=1;
	}
	for(int i=0;i<tr.size();++i)
	{
		if(vis[i])
		{
			continue;
		}
		if(not_root[i])
		{
			continue;
		}
		dfs(i,-1);
	}
	precompute();
	/*for(int i=0;i<tr.size();i++)
	{
		cout<<i<<"->"<<dp[i][0]<<endl;
	}
	cout<<endl;*/
	int q;
	cin>>q;
	for(int i=0;i<q;++i)
	{
		int x1,y1,x2,y2;
		cin>>x1>>y1>>x2>>y2;
		if(x1==x2)
		{
			cout<<"Yes\n";
			continue;
		}
		if(!newx.count(x1))
		{
			cout<<"No\n";
			continue;
		}
		if(!newx.count(x2-1))
		{
			cout<<"No\n";
			continue;
		}
		int xx=newx[x1];
		auto xd=ys[xx].lower_bound(y1);
		if(xd==ys[xx].end())
		{
			cout<<"No\n";
			continue;
		}
		int u=no[{xx,(*xd)}];
		for(int j=17;j>=0;--j)
		{
			if(dp[u][j]==-1)continue;
			if(tr[dp[u][j]].x<x2)
			{
				u=dp[u][j];
			}
		}
		if(tr[u].x!=x2-1)
		{
			cout<<"No\n";
			continue;
		}
		if(tr[u].y>y2)
		{
			cout<<"No\n";
			continue;
		}
		cout<<"Yes\n";
		continue;
	}
return 0;
}

Compilation message

trampoline.cpp: In function 'void precompute()':
trampoline.cpp:41:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<trampoline>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   41 |   for(int i=0;i<tr.size();i++)
      |               ~^~~~~~~~~~
trampoline.cpp: In function 'int main()':
trampoline.cpp:67:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<trampoline>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   67 |  for(int i=0;i<tr.size();++i)
      |              ~^~~~~~~~~~
trampoline.cpp:72:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<trampoline>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   72 |  for(int i=0;i<tr.size();++i)
      |              ~^~~~~~~~~~
trampoline.cpp:88:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<trampoline>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   88 |  for(int i=0;i<tr.size();++i)
      |              ~^~~~~~~~~~

Subtask #1
23.0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 23 ms 16364 KB 200 token(s): yes count is 21, no count is 179
2 Correct 24 ms 16620 KB 200 token(s): yes count is 70, no count is 130
3 Correct 22 ms 15980 KB 197 token(s): yes count is 25, no count is 172

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 773 ms 56540 KB 4000 token(s): yes count is 99, no count is 3901
2 Correct 769 ms 56540 KB 4000 token(s): yes count is 91, no count is 3909
3 Correct 713 ms 58568 KB 4000 token(s): yes count is 4000, no count is 0
4 Correct 764 ms 56764 KB 4000 token(s): yes count is 1991, no count is 2009

Subtask #3
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 935 ms 55284 KB 200000 token(s): yes count is 110486, no count is 89514
2 Correct 1016 ms 56908 KB 200000 token(s): yes count is 114664, no count is 85336
3 Correct 1100 ms 56932 KB 200000 token(s): yes count is 86232, no count is 113768
4 Correct 1303 ms 58940 KB 200000 token(s): yes count is 94603, no count is 105397
5 Correct 1401 ms 69756 KB 200000 token(s): yes count is 94148, no count is 105852
6 Correct 1811 ms 78748 KB 200000 token(s): yes count is 97163, no count is 102837

Subtask #4
0 / 19.0

# Verdict Execution time Memory Grader output
1 Incorrect 24 ms 15468 KB expected NO, found YES [16th token]
2 Halted 0 ms 0 KB -

Subtask #5
0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 1996 ms 73052 KB 200000 token(s): yes count is 171404, no count is 28596
2 Incorrect 1653 ms 72508 KB expected NO, found YES [22020th token]
3 Halted 0 ms 0 KB -