oj.uz

Submission #298862

# Submission time Handle Problem Language Result Execution time Memory
298862 2020-09-14T08:28:49 Z AMO5 Tropical Garden (IOI11_garden) C++17
100 / 100
 149 ms 30072 KB 
#include "garden.h"
#include "gardenlib.h"
#include <bits/stdc++.h>

using namespace std;

#define vi vector<int>
#define eb emplace_back

const int mxn = 3e5+5;
vi adj[mxn];
int n,q,F[mxn],deg[mxn],vis[mxn],dist[mxn],D[mxn],Cnt[mxn],ans[2002];

struct query{
	int k,ind;
	query(int kk, int i){
		k=kk,ind=i;
	}
	bool operator < (const query &rhs)const{
		return k<rhs.k;
	}
};

vector<query>qq;

void add(int a, int b, int ind){
	if(vis[a]==ind){
		if(vis[b]!=ind||deg[b]==1)F[a]=b;
		else F[a]=b+n;
	}else if(F[a+n]==-1){
		if(vis[b]!=ind||deg[b]==1)F[a+n]=b;
		else F[a+n]=b+n;
	}
}

void dfs(int u, int d){
	dist[u]=d;
	for(int v:adj[u]){
		if(dist[v]==-1)dfs(v,d+1);
	}
}

void run(int st){
	for(int i=0; i<=2*n; i++){
		dist[i]=-1;
		vis[i]=0;
		Cnt[i]=0;
	}
	dfs(st,0);
	int cnt = 0;
	for(int i=0; i<n; i++){
		if(dist[i]!=-1){
			D[cnt++]=dist[i];
		}
	}
	sort(D,D+cnt);
	//calculate cycle size
	int c = 0;
	int now = st;
	while(!vis[now]){
		c++;
		vis[now]=1;
		now = F[now];
	}
	if(now!=st)c=1000000009;
	int ptr = 0;
	for(int i=0; i<q; i++){
		while(ptr<cnt&&D[ptr]<=qq[i].k){
			Cnt[D[ptr]%c]++;
			ptr++;
		}
		int md = qq[i].k%c;
		if(md>2*n)continue;
		ans[qq[i].ind]+=Cnt[md];
	}
	return;
}


void count_routes(int N, int M, int P, int R[][2], int Q, int G[]){
	n=N,q=Q;
	int m=M;
	for(int i=0; i<q; i++){
		qq.eb(G[i],i);
	}
	sort(qq.begin(),qq.end());
	for(int i=0; i<m; i++){
		int u = R[i][0], v = R[i][1];
		deg[u]++,deg[v]++;
		if(!vis[u])vis[u]=i+1;
		if(!vis[v])vis[v]=i+1;
	}
	memset(F,-1,sizeof(F));
	for(int i=0; i<m; i++){
		int u = R[i][0], v = R[i][1];
		add(u,v,i+1);
		add(v,u,i+1);
	}
	for(int i=0; i<n; i++){
		adj[F[i]].eb(i);
		if(deg[i]>1)adj[F[i+n]].eb(i+n);
	}
	run(P);
	if(deg[P]>1)run(P+n);
	for(int i=0; i<q; i++)answer(ans[i]);
}

Subtask #1
49.0 / 49.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 8704 KB Output is correct
2 Correct 6 ms 8704 KB Output is correct
3 Correct 6 ms 8704 KB Output is correct
4 Correct 7 ms 8576 KB Output is correct
5 Correct 6 ms 8576 KB Output is correct
6 Correct 7 ms 8832 KB Output is correct
7 Correct 6 ms 8576 KB Output is correct
8 Correct 6 ms 8832 KB Output is correct
9 Correct 8 ms 8832 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 8704 KB Output is correct
2 Correct 6 ms 8704 KB Output is correct
3 Correct 6 ms 8704 KB Output is correct
4 Correct 7 ms 8576 KB Output is correct
5 Correct 6 ms 8576 KB Output is correct
6 Correct 7 ms 8832 KB Output is correct
7 Correct 6 ms 8576 KB Output is correct
8 Correct 6 ms 8832 KB Output is correct
9 Correct 8 ms 8832 KB Output is correct
10 Correct 6 ms 8576 KB Output is correct
11 Correct 15 ms 10624 KB Output is correct
12 Correct 28 ms 11904 KB Output is correct
13 Correct 59 ms 23544 KB Output is correct
14 Correct 86 ms 19576 KB Output is correct
15 Correct 120 ms 20344 KB Output is correct
16 Correct 93 ms 17400 KB Output is correct
17 Correct 84 ms 16504 KB Output is correct
18 Correct 28 ms 11904 KB Output is correct
19 Correct 89 ms 19596 KB Output is correct
20 Correct 120 ms 20344 KB Output is correct
21 Correct 97 ms 17400 KB Output is correct
22 Correct 87 ms 16376 KB Output is correct
23 Correct 86 ms 20472 KB Output is correct

Subtask #3
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 8704 KB Output is correct
2 Correct 6 ms 8704 KB Output is correct
3 Correct 6 ms 8704 KB Output is correct
4 Correct 7 ms 8576 KB Output is correct
5 Correct 6 ms 8576 KB Output is correct
6 Correct 7 ms 8832 KB Output is correct
7 Correct 6 ms 8576 KB Output is correct
8 Correct 6 ms 8832 KB Output is correct
9 Correct 8 ms 8832 KB Output is correct
10 Correct 6 ms 8576 KB Output is correct
11 Correct 15 ms 10624 KB Output is correct
12 Correct 28 ms 11904 KB Output is correct
13 Correct 59 ms 23544 KB Output is correct
14 Correct 86 ms 19576 KB Output is correct
15 Correct 120 ms 20344 KB Output is correct
16 Correct 93 ms 17400 KB Output is correct
17 Correct 84 ms 16504 KB Output is correct
18 Correct 28 ms 11904 KB Output is correct
19 Correct 89 ms 19596 KB Output is correct
20 Correct 120 ms 20344 KB Output is correct
21 Correct 97 ms 17400 KB Output is correct
22 Correct 87 ms 16376 KB Output is correct
23 Correct 86 ms 20472 KB Output is correct
24 Correct 6 ms 8704 KB Output is correct
25 Correct 15 ms 10624 KB Output is correct
26 Correct 29 ms 12024 KB Output is correct
27 Correct 61 ms 23680 KB Output is correct
28 Correct 89 ms 19576 KB Output is correct
29 Correct 124 ms 20472 KB Output is correct
30 Correct 92 ms 17600 KB Output is correct
31 Correct 91 ms 16632 KB Output is correct
32 Correct 30 ms 12032 KB Output is correct
33 Correct 86 ms 19576 KB Output is correct
34 Correct 149 ms 20344 KB Output is correct
35 Correct 94 ms 17400 KB Output is correct
36 Correct 93 ms 16504 KB Output is correct
37 Correct 86 ms 20600 KB Output is correct
38 Correct 94 ms 30072 KB Output is correct