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답안 #64775

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
64775 2018-08-05T15:21:30 Z TadijaSebez 열대 식물원 (Tropical Garden) (IOI11_garden) C++11
69 / 100
 140 ms 24968 KB 
#include "garden.h"
#include "gardenlib.h"
#include <stdio.h>
#include <vector>
#include <algorithm>
using namespace std;
#define pb push_back
const int N=150050;
const int M=2*N;
//---------------------//
/*
void answer(int x){ printf("%i\n",x);}
*/
//---------------------//
int go[M],lo[M],dep[M];
vector<int> E[M];
void DFS(int u, int p)
{
	for(int i=0;i<E[u].size();i++)
	{
		int v=E[u][i];
		dep[v]=dep[u]+1;
		if(v!=p) DFS(v,p);
	}
}
pair<int,int> Qs[N];
int cnt[M],sol[N];
void count_routes(int n, int m, int p, int r[][2], int q, int k[])
{
	int i,j;
	for(i=0;i<q;i++) Qs[i].first=k[i],Qs[i].second=i;
	sort(Qs,Qs+q);
	for(i=0;i<n*2;i++) lo[i]=-1;
	for(i=0;i<n*2;i++) go[i]=-1;
	for(i=0;i<m;i++)
	{
		if(lo[r[i][0]<<1]==-1) lo[r[i][0]<<1]=i;
		else if(lo[r[i][0]<<1|1]==-1) lo[r[i][0]<<1|1]=i;
		if(lo[r[i][1]<<1]==-1) lo[r[i][1]<<1]=i;
		else if(lo[r[i][1]<<1|1]==-1) lo[r[i][1]<<1|1]=i;
	}
	for(i=0;i<n*2;i++)
	{
		int x=lo[i];
		if(lo[i]==-1) x=lo[i^1];
		int v=r[x][0];
		if(v==i/2) v=r[x][1];
		if(x==lo[v<<1]) go[i]=v<<1|1;
		else go[i]=v<<1;
	}
	for(i=0;i<2*n;i++)
	{
		E[go[i]].pb(i);
		//printf("%i -> %i\n",go[i],i);
		dep[i]=-1;
	}
	dep[p<<1]=0;
	DFS(p<<1,p<<1);
	if(dep[p<<1]==0)
	{
		for(i=0;i<2*n;i+=2) if(dep[i]>=0) cnt[dep[i]]++;
		for(i=0;i<q;i++) if(k[i]<M) sol[i]+=cnt[k[i]];
		for(i=0;i<2*n;i+=2) if(dep[i]>=0) cnt[dep[i]]--;
	}
	else
	{
		int cyc=dep[p<<1];
		dep[p<<1]=0;
		j=0;
		vector<int> Ds;
		for(i=0;i<2*n;i+=2) if(dep[i]>=0) Ds.pb(dep[i]);
		sort(Ds.begin(),Ds.end());
		for(i=0;i<q;i++)
		{
			while(j<Ds.size() && Ds[j]<=Qs[i].first) cnt[Ds[j]%cyc]++,j++;
			sol[Qs[i].second]+=cnt[Qs[i].first%cyc];
		}
		for(i=0;i<cyc;i++) cnt[i]=0;
	}
	for(i=0;i<2*n;i++) dep[i]=-1;
	dep[p<<1|1]=0;
	DFS(p<<1|1,p<<1|1);
	if(dep[p<<1|1]==0)
	{
		for(i=0;i<2*n;i+=2) if(dep[i]>=0) cnt[dep[i]]++;
		for(i=0;i<q;i++) if(k[i]<M) sol[i]+=cnt[k[i]];
		for(i=0;i<2*n;i+=2) if(dep[i]>=0) cnt[dep[i]]--;
	}
	else
	{
		int cyc=dep[p<<1|1];
		dep[p<<1|1]=0;
		//printf("%i :D\n",cyc);
		j=0;
		vector<int> Ds;
		for(i=0;i<2*n;i+=2) if(dep[i]>=0) Ds.pb(dep[i]);
		sort(Ds.begin(),Ds.end());
		for(i=0;i<q;i++)
		{
			while(j<Ds.size() && Ds[j]<=Qs[i].first) cnt[Ds[j]%cyc]++,j++;
			sol[Qs[i].second]+=cnt[Qs[i].first%cyc];
		}
		for(i=0;i<cyc;i++) cnt[i]=0;
	}
	for(i=0;i<q;i++) answer(sol[i]);
}
//---------------------//
/*
int r[N][2],k[N];
int main()
{
	int n,m,p,q,i;
	scanf("%i %i %i",&n,&m,&p);
	for(i=0;i<m;i++) scanf("%i %i",&r[i][0],&r[i][1]);
	scanf("%i",&q);
	for(i=0;i<q;i++) scanf("%i",&k[i]);
	count_routes(n,m,p,r,q,k);
	return 0;
}
*/
//---------------------//

Compilation message

garden.cpp: In function 'void DFS(int, int)':
garden.cpp:19:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<E[u].size();i++)
              ~^~~~~~~~~~~~
garden.cpp: In function 'void count_routes(int, int, int, int (*)[2], int, int*)':
garden.cpp:75:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    while(j<Ds.size() && Ds[j]<=Qs[i].first) cnt[Ds[j]%cyc]++,j++;
          ~^~~~~~~~~~
garden.cpp:100:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    while(j<Ds.size() && Ds[j]<=Qs[i].first) cnt[Ds[j]%cyc]++,j++;
          ~^~~~~~~~~~

Subtask #1
49.0 / 49.0

# 결과 실행 시간 메모리 Grader output
1 Correct 8 ms 7516 KB Output is correct
2 Correct 9 ms 7516 KB Output is correct
3 Correct 9 ms 7524 KB Output is correct
4 Correct 8 ms 7492 KB Output is correct
5 Correct 8 ms 7416 KB Output is correct
6 Correct 9 ms 7544 KB Output is correct
7 Correct 9 ms 7368 KB Output is correct
8 Correct 9 ms 7424 KB Output is correct
9 Correct 10 ms 7580 KB Output is correct

Subtask #2
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 8 ms 7516 KB Output is correct
2 Correct 9 ms 7516 KB Output is correct
3 Correct 9 ms 7524 KB Output is correct
4 Correct 8 ms 7492 KB Output is correct
5 Correct 8 ms 7416 KB Output is correct
6 Correct 9 ms 7544 KB Output is correct
7 Correct 9 ms 7368 KB Output is correct
8 Correct 9 ms 7424 KB Output is correct
9 Correct 10 ms 7580 KB Output is correct
10 Correct 8 ms 7416 KB Output is correct
11 Correct 19 ms 9244 KB Output is correct
12 Correct 32 ms 10136 KB Output is correct
13 Correct 72 ms 24968 KB Output is correct
14 Correct 106 ms 16468 KB Output is correct
15 Correct 140 ms 17552 KB Output is correct
16 Correct 113 ms 15048 KB Output is correct
17 Correct 99 ms 14092 KB Output is correct
18 Correct 34 ms 10264 KB Output is correct
19 Correct 105 ms 16556 KB Output is correct
20 Correct 137 ms 17216 KB Output is correct
21 Correct 115 ms 14852 KB Output is correct
22 Correct 100 ms 13728 KB Output is correct
23 Correct 108 ms 17248 KB Output is correct

Subtask #3
0 / 31.0

# 결과 실행 시간 메모리 Grader output
1 Correct 8 ms 7516 KB Output is correct
2 Correct 9 ms 7516 KB Output is correct
3 Correct 9 ms 7524 KB Output is correct
4 Correct 8 ms 7492 KB Output is correct
5 Correct 8 ms 7416 KB Output is correct
6 Correct 9 ms 7544 KB Output is correct
7 Correct 9 ms 7368 KB Output is correct
8 Correct 9 ms 7424 KB Output is correct
9 Correct 10 ms 7580 KB Output is correct
10 Correct 8 ms 7416 KB Output is correct
11 Correct 19 ms 9244 KB Output is correct
12 Correct 32 ms 10136 KB Output is correct
13 Correct 72 ms 24968 KB Output is correct
14 Correct 106 ms 16468 KB Output is correct
15 Correct 140 ms 17552 KB Output is correct
16 Correct 113 ms 15048 KB Output is correct
17 Correct 99 ms 14092 KB Output is correct
18 Correct 34 ms 10264 KB Output is correct
19 Correct 105 ms 16556 KB Output is correct
20 Correct 137 ms 17216 KB Output is correct
21 Correct 115 ms 14852 KB Output is correct
22 Correct 100 ms 13728 KB Output is correct
23 Correct 108 ms 17248 KB Output is correct
24 Incorrect 9 ms 7396 KB Output isn't correct
25 Halted 0 ms 0 KB -