oj.uz

Submission #62838

# Submission time Handle Problem Language Result Execution time Memory
62838 2018-07-30T12:53:29 Z zetapi Tropical Garden (IOI11_garden) C++14
100 / 100
 3026 ms 40952 KB 
#include "garden.h"
#include "gardenlib.h"
 
#include <bits/stdc++.h>
using namespace std;
 
#define pb  push_back
#define mp  make_pair
#define	ll  long long
#define itr ::iterator 
 
typedef pair<int,int>  pii;
 
const int MAX=1e6;
 
vector<pii> vec[MAX];
 
int P_,lol,deg[MAX],res[MAX];
int type[MAX],Distance[MAX];
int Min[MAX],SecMin[MAX],mark[MAX][2];
pii dp[2];

bool cal(int X,int Y)
{
	return (X>=0 and Y>0 and X%Y==0);
}


void dfs(int node,int types,int dis)
{
	if(node==P_)
		return ;
	else if(types==1)
	{
		type[node]=lol;
		Distance[node]=dis;
		for(auto A:vec[node])
		{
			if(deg[node]>1 and A.first==Min[node])
				continue;
			dfs(A.first,A.second,dis+1);
		}
		return ;
	}
	else if(types==2)
	{
		for(auto A:vec[node])
			if(A.first==Min[node])
				dfs(A.first,A.second,dis+1);
		return ;
	}
	return ;
}
 
void count_routes(int N, int M, int P, int R[][2], int Q, int G[])
{
	P_=P;
	int u,v;
	for(int A=0;A<N;A++)
	{
		Min[A]=-1;
		SecMin[A]=-1;
		type[A]=-1;
		Distance[A]=-1;
	}
	for(int A=0;A<M;A++)
	{
		u=R[A][0];
		v=R[A][1];
		if(deg[u]<2)	
		{
			++deg[u];
			vec[v].pb(mp(u,deg[u]));
		}
		if(deg[v]<2)
		{
			++deg[v];
			vec[u].pb(mp(v,deg[v]));
		}
		if(Min[u]!=-1 and SecMin[u]==-1)
			SecMin[u]=v;
		if(Min[v]!=-1 and SecMin[v]==-1)
			SecMin[v]=u;
		if(Min[u]==-1)
			Min[u]=v;
		if(Min[v]==-1)
			Min[v]=u;
	}
	Distance[P]=0;
	type[P]=0;
	for(auto A:vec[P])
	{
		lol=(A.first==Min[P]);
		dfs(A.first,A.second,1);
	}

	dp[0]=mp(-1,0);
	dp[1]=mp(-1,0);
	int cur=P,pre=-1;
	while(true)
	{
		dp[0].second++;
		if(deg[cur]>1 and Min[cur]==pre)
		{
			if(mark[cur][0])
				break;
			mark[cur][0]=1;
			pre=cur;
			cur=SecMin[cur];
		}
		else
		{
			if(mark[cur][1])
				break;
			mark[cur][1]=1;
			pre=cur;
			cur=Min[cur];
		}
		if(cur==P)
		{
			dp[0].first=(pre==Min[P]);
			break;
		}
	}

	for(int A=0;A<N;A++)
	{
		mark[A][0]=0;
		mark[A][1]=0;
	}
	if(deg[P]>1)
	{
		pre=P;
		cur=SecMin[P];
		dp[1].second++;
		while(true)
		{
			dp[1].second++;
			if(deg[cur]>1 and Min[cur]==pre)
			{
				if(mark[cur][0])
					break;
				mark[cur][0]=1;
				pre=cur;
				cur=SecMin[cur];
			}
			else
			{
				if(mark[cur][1])
					break;
				mark[cur][1]=1;
				pre=cur;
				cur=Min[cur];
			}
			if(cur==P)
			{
				dp[1].first=(pre==Min[P]);
				break;
			}		
		}
	}	

	int ok,final;
	for(int A=0;A<Q;A++)
	{
		for(int B=0;B<N;B++)
		{
			if(Distance[B]==-1)
				continue;
			ok=0;
			final=G[A];
			ok|=(Distance[B]==final);
          	final-=Distance[B];
			if(type[B]==0 or deg[P]==1)	//We'll exit for first time using Min
			{
				if(dp[0].first==1 and dp[1].first==0)// Min-SecMin-Min-SecMin
				{
					ok|=cal(final,dp[0].second+dp[1].second);
					final-=dp[0].second;
					ok|=cal(final,dp[0].second+dp[1].second);
				}
				else if(dp[0].first==1 and dp[1].first==1)// Min-SecMin-SecMin-SecMin
				{	
					final-=dp[0].second;
					ok|=cal(final,dp[1].second);
				}
				else if(dp[0].first==0 or (dp[0].first==1 and deg[P]==1))// Min-Min-Min
				{
					ok|=cal(final,dp[0].second);
				}
			}
			else if(type[B]==1)	//We'll exit this time using SecMin
			{
				if(dp[1].first==0 and dp[0].first==1)// SecMin-Min-SecMin-Min
				{
					ok|=cal(final,dp[1].second+dp[0].second);
					final-=dp[1].second;
					ok|=cal(final,dp[1].second+dp[0].second);
				}
				else if(dp[1].first==0 and dp[0].first==0)// SecMin-Min-Min-Min
				{
					final-=dp[1].second;
					ok|=cal(final,dp[0].second);
				}
				else if(dp[1].first==1)//SecMin-SecMin-SecMin
				{
					ok|=cal(final,dp[1].second);
				}
			}
			res[A]+=ok;
		}
	}
	for(int A=0;A<Q;A++)
		answer(res[A]);
		//cout<<res[A]<<"\n";
	return ;
}
 
/*signed main()
{
	ios_base::sync_with_stdio(false);
 
	
	int G[]={3};
	int R[][2]={{1,2},{0,1},{0,3},{3,4},{4,5},{1,5}};
	count_routes(6,6,0,R,1,G);
	return 0;
}*/

Subtask #1
49.0 / 49.0

# Verdict Execution time Memory Grader output
1 Correct 31 ms 24032 KB Output is correct
2 Correct 30 ms 23972 KB Output is correct
3 Correct 24 ms 23928 KB Output is correct
4 Correct 30 ms 23824 KB Output is correct
5 Correct 28 ms 23800 KB Output is correct
6 Correct 28 ms 23976 KB Output is correct
7 Correct 30 ms 23900 KB Output is correct
8 Correct 30 ms 23928 KB Output is correct
9 Correct 27 ms 24028 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 31 ms 24032 KB Output is correct
2 Correct 30 ms 23972 KB Output is correct
3 Correct 24 ms 23928 KB Output is correct
4 Correct 30 ms 23824 KB Output is correct
5 Correct 28 ms 23800 KB Output is correct
6 Correct 28 ms 23976 KB Output is correct
7 Correct 30 ms 23900 KB Output is correct
8 Correct 30 ms 23928 KB Output is correct
9 Correct 27 ms 24028 KB Output is correct
10 Correct 23 ms 23928 KB Output is correct
11 Correct 33 ms 25312 KB Output is correct
12 Correct 46 ms 26436 KB Output is correct
13 Correct 63 ms 37572 KB Output is correct
14 Correct 99 ms 34280 KB Output is correct
15 Correct 126 ms 34528 KB Output is correct
16 Correct 99 ms 32092 KB Output is correct
17 Correct 87 ms 31096 KB Output is correct
18 Correct 46 ms 26872 KB Output is correct
19 Correct 99 ms 34188 KB Output is correct
20 Correct 122 ms 34404 KB Output is correct
21 Correct 103 ms 31864 KB Output is correct
22 Correct 101 ms 30992 KB Output is correct
23 Correct 100 ms 35132 KB Output is correct

Subtask #3
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 31 ms 24032 KB Output is correct
2 Correct 30 ms 23972 KB Output is correct
3 Correct 24 ms 23928 KB Output is correct
4 Correct 30 ms 23824 KB Output is correct
5 Correct 28 ms 23800 KB Output is correct
6 Correct 28 ms 23976 KB Output is correct
7 Correct 30 ms 23900 KB Output is correct
8 Correct 30 ms 23928 KB Output is correct
9 Correct 27 ms 24028 KB Output is correct
10 Correct 23 ms 23928 KB Output is correct
11 Correct 33 ms 25312 KB Output is correct
12 Correct 46 ms 26436 KB Output is correct
13 Correct 63 ms 37572 KB Output is correct
14 Correct 99 ms 34280 KB Output is correct
15 Correct 126 ms 34528 KB Output is correct
16 Correct 99 ms 32092 KB Output is correct
17 Correct 87 ms 31096 KB Output is correct
18 Correct 46 ms 26872 KB Output is correct
19 Correct 99 ms 34188 KB Output is correct
20 Correct 122 ms 34404 KB Output is correct
21 Correct 103 ms 31864 KB Output is correct
22 Correct 101 ms 30992 KB Output is correct
23 Correct 100 ms 35132 KB Output is correct
24 Correct 25 ms 23900 KB Output is correct
25 Correct 95 ms 25648 KB Output is correct
26 Correct 111 ms 27140 KB Output is correct
27 Correct 1800 ms 38580 KB Output is correct
28 Correct 1080 ms 34292 KB Output is correct
29 Correct 1835 ms 34084 KB Output is correct
30 Correct 1167 ms 31604 KB Output is correct
31 Correct 1165 ms 30968 KB Output is correct
32 Correct 122 ms 27000 KB Output is correct
33 Correct 1048 ms 33756 KB Output is correct
34 Correct 1782 ms 33944 KB Output is correct
35 Correct 1158 ms 31572 KB Output is correct
36 Correct 1723 ms 30736 KB Output is correct
37 Correct 706 ms 34612 KB Output is correct
38 Correct 3026 ms 40952 KB Output is correct