oj.uz

답안 #676133

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
676133 2022-12-29T12:15:01 Z esomer 열대 식물원 (Tropical Garden) (IOI11_garden) C++17
100 / 100
 2473 ms 36308 KB 
#include<bits/stdc++.h>
#include "garden.h"
 
using namespace std;
 
#define ll long long
#define endl "\n"
 
const int MOD = 998244353;
const int maxN = 150000;

pair<int, int> oradj[maxN];
vector<int> adj;
vector<vector<int>> radj;
pair<int, int> ind[maxN]; //First, can take the best, second can't take it.
int rel[2 * maxN];
int dist1[2 * maxN];
int dist2[2 * maxN];
int sz, first, important;

void answer(int x);

bool find_cycle(int x, vector<bool>& vis, vector<bool>& stck){
	if(x == -1) return 0;
	vis[x] = 1;
	stck[x] = 1;
	if(stck[adj[x]]){
		first = adj[x];
		sz = 1;
		return 1;
	}
	if(!vis[adj[x]]){
		bool cyc = find_cycle(adj[x], vis, stck);
		if(cyc){
			sz++;
			if(first == x) return 0;
			else return 1;
		}
	}
	stck[x] = 0;
	if(x == important) sz = -1;
	return 0;
}

void DFS(int x, vector<bool>& vis, int type, int dist){
	if(x == -1) return;
	//~ cout << "X " << x << " dist " << dist << endl;
	if(type == 1) dist1[x] = dist;
	else dist2[x] = dist;
	vis[x] = 1;
	for(int node : radj[x]){
		if(!vis[node]) DFS(node, vis, type, dist + 1);
	}
}

void count_routes(int N, int M, int P, int R[][2], int Q, int G[]){
	for(int i = 0; i < N; i++) oradj[i] = {-1, -1};
	for(int i = 0; i < M; i++){
		int u = R[i][0]; int v = R[i][1];
		if(oradj[u].first == -1) oradj[u].first = v;
		else if(oradj[u].second == -1) oradj[u].second = v;
		if(oradj[v].first == -1) oradj[v].first = u;
		else if(oradj[v].second == -1) oradj[v].second = u;
	}
	int curr = 0;
	for(int i = 0; i < N; i++){
		if(oradj[i].second != -1){
			ind[i] = {curr, curr + 1};
			rel[curr] = i; rel[curr + 1] = i;
			curr += 2;
		}else{
			ind[i] = {curr, -1}; 
			rel[curr] = i;
			curr++;
		}
	}
	adj.resize(curr); radj.resize(curr);
	for(int i = 0; i < curr; i++){
		int node = rel[i];
		if(ind[node].first == i){
			int go;
			if(oradj[oradj[node].first].first == node){
				if(oradj[oradj[node].first].second == -1) go = ind[oradj[node].first].first;
				else go = ind[oradj[node].first].second;
			}else{
				go = ind[oradj[node].first].first;
			}
			adj[i] = go;
			radj[go].push_back(i);
		}else{
			int go;
			if(oradj[oradj[node].second].first == node){
				if(oradj[oradj[node].second].second == -1) go = ind[oradj[node].second].first;
				else go = ind[oradj[node].second].second;
			}else{
				go = ind[oradj[node].second].first;
			}
			adj[i] = go;
			radj[go].push_back(i);
		}
	}
	//~ for(int i = 0; i < N; i++){
		//~ cout << "I " << i << " ind " << ind[i].first << " " << ind[i].second << endl;
	//~ }
	//~ for(int i = 0; i < curr; i++){
		//~ cout << "I " <<i << " adj " << adj[i] << endl;
	//~ }
	pair<int, int> cycles;
	vector<bool> vis(curr, 0);
	vector<bool> stck(curr, 0);
	sz = -1;
	important = ind[P].first;
	find_cycle(ind[P].first, vis, stck);
	cycles.first = sz; 
	vis.assign(curr, 0); stck.assign(curr, 0);
	sz = -1;
	important = ind[P].second;
	find_cycle(ind[P].second, vis, stck);
	cycles.second = sz;
	vis.assign(curr, 0);
	for(int i = 0; i < curr; i++){
		dist1[i] = -1;
		dist2[i] = -1;
	}
	DFS(ind[P].first, vis, 1, 0);
	vis.assign(curr, 0);
	DFS(ind[P].second, vis, 2, 0);
	//~ cout << "cycles " << cycles.first << " " << cycles.second << endl;
	//~ cout << "Dist1" << endl;
	//~ for(int i = 0; i < curr; i++){
		//~ cout << "I " << i << " " << dist1[i] << endl;
	//~ }
	//~ cout << "Dist2" << endl;
	//~ for(int i = 0; i < curr; i++){
		//~ cout << "I " << i << " " << dist2[i] << endl;
	//~ }
	for(int q = 0; q < Q; q++){
		int k = G[q];
		int ans = 0;
		for(int i = 0; i < N; i++){
			int id = ind[i].first;
			if(dist1[id] != -1 && dist1[id] <= k){
				int left = k - dist1[id];
				if(left == 0 || (cycles.first != -1 && left % cycles.first == 0)) ans++;
			}
			if(dist2[id] != -1 && dist2[id] <= k){
				int left = k - dist2[id];
				if(left == 0 || (cycles.second != -1 && left % cycles.second == 0)) ans++;
			}
		}
		//~ cout << "q " << q << " ans " << ans << " k " << k << endl;
		answer(ans);
	}
}
 
//~ #define MAX_M  1000000
//~ #define MAX_Q  2000

//~ static int N, M, P, Q;
//~ static int R[MAX_M][2];
//~ static int G[MAX_Q];
//~ static int solutions[MAX_Q];
//~ static int answers[MAX_Q];
//~ static int answer_count;

//~ inline 
//~ void my_assert(int e) {if (!e) abort();}
//~ void read_input()
//~ {
  //~ int i;
  //~ my_assert(3==scanf("%d %d %d",&N,&M,&P));
  //~ for(i=0; i<M; i++)
    //~ my_assert(2==scanf("%d %d",&R[i][0],&R[i][1]));
  //~ my_assert(1==scanf("%d",&Q));
  //~ for(i=0; i<Q; i++)
    //~ my_assert(1==scanf("%d",&G[i]));
  //~ for(i=0; i<Q; i++)
    //~ my_assert(1==scanf("%d",&solutions[i]));
//~ }

//~ void answer(int x)
//~ {
  //~ if(answer_count>=Q) {
    //~ printf("Incorrect.  Too many answers.\n");
    //~ exit(0);
  //~ }
  //~ answers[answer_count] = x;
  //~ answer_count++;
//~ }

//~ int main()
//~ {
  //~ int correct, i;

  //~ read_input();
  //~ answer_count = 0;
  //~ count_routes(N,M,P,R,Q,G);

  //~ if(answer_count!=Q) {
    //~ printf("Incorrect.  Too few answers.\n");
    //~ exit(0);
  //~ }

  //~ correct = 1;
  //~ for(i=0; i<Q; i++)
    //~ if(answers[i]!=solutions[i])
      //~ correct = 0;
  //~ if(correct)
    //~ printf("Correct.\n");
  //~ else {
    //~ printf("Incorrect.\n");
    //~ printf("Expected: ");
    //~ for(i=0; i<Q; i++)
      //~ printf("%d ",solutions[i]);
    //~ printf("\nReturned: ");
    //~ for(i=0; i<Q; i++)
      //~ printf("%d ",answers[i]);
  //~ }
  //~ return 0;
//~ }

Subtask #1
49.0 / 49.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 468 KB Output is correct
2 Correct 1 ms 444 KB Output is correct
3 Correct 1 ms 468 KB Output is correct
4 Correct 0 ms 312 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 596 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 468 KB Output is correct
9 Correct 2 ms 596 KB Output is correct

Subtask #2
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 468 KB Output is correct
2 Correct 1 ms 444 KB Output is correct
3 Correct 1 ms 468 KB Output is correct
4 Correct 0 ms 312 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 596 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 468 KB Output is correct
9 Correct 2 ms 596 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 8 ms 3540 KB Output is correct
12 Correct 17 ms 5860 KB Output is correct
13 Correct 43 ms 25904 KB Output is correct
14 Correct 67 ms 17868 KB Output is correct
15 Correct 89 ms 18296 KB Output is correct
16 Correct 61 ms 14376 KB Output is correct
17 Correct 58 ms 12716 KB Output is correct
18 Correct 18 ms 5836 KB Output is correct
19 Correct 66 ms 17824 KB Output is correct
20 Correct 86 ms 18392 KB Output is correct
21 Correct 62 ms 14256 KB Output is correct
22 Correct 53 ms 12620 KB Output is correct
23 Correct 67 ms 19384 KB Output is correct

Subtask #3
31.0 / 31.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 468 KB Output is correct
2 Correct 1 ms 444 KB Output is correct
3 Correct 1 ms 468 KB Output is correct
4 Correct 0 ms 312 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 596 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 468 KB Output is correct
9 Correct 2 ms 596 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 8 ms 3540 KB Output is correct
12 Correct 17 ms 5860 KB Output is correct
13 Correct 43 ms 25904 KB Output is correct
14 Correct 67 ms 17868 KB Output is correct
15 Correct 89 ms 18296 KB Output is correct
16 Correct 61 ms 14376 KB Output is correct
17 Correct 58 ms 12716 KB Output is correct
18 Correct 18 ms 5836 KB Output is correct
19 Correct 66 ms 17824 KB Output is correct
20 Correct 86 ms 18392 KB Output is correct
21 Correct 62 ms 14256 KB Output is correct
22 Correct 53 ms 12620 KB Output is correct
23 Correct 67 ms 19384 KB Output is correct
24 Correct 1 ms 328 KB Output is correct
25 Correct 98 ms 3612 KB Output is correct
26 Correct 139 ms 5888 KB Output is correct
27 Correct 2143 ms 26052 KB Output is correct
28 Correct 977 ms 18000 KB Output is correct
29 Correct 2453 ms 18428 KB Output is correct
30 Correct 1344 ms 14592 KB Output is correct
31 Correct 1374 ms 12756 KB Output is correct
32 Correct 149 ms 5836 KB Output is correct
33 Correct 992 ms 18036 KB Output is correct
34 Correct 2473 ms 18400 KB Output is correct
35 Correct 1446 ms 14440 KB Output is correct
36 Correct 1392 ms 12880 KB Output is correct
37 Correct 746 ms 19416 KB Output is correct
38 Correct 1900 ms 36308 KB Output is correct