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답안 #216223

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
216223 2020-03-26T23:40:59 Z peuch 열대 식물원 (Tropical Garden) (IOI11_garden) C++17
49 / 100
 47 ms 16760 KB 
#include "garden.h"
#include "gardenlib.h"
#include <bits/stdc++.h>
using namespace std;

const int MAXN = 150010;

int beaulty[MAXN][2];
int ar[2 * MAXN], in[2 * MAXN], dist[2 * MAXN], marc[2 * MAXN];
vector<int> rev[2 * MAXN];
int cycleSize;
int n, p;

void bfs(int ini);
void getCycle();

void count_routes(int N, int M, int P, int R[][2], int Q, int G[])
{	
	p = P;
	n = N;
	for(int i = 0; i < N; i++){
		ar[2 * i] = -1;
		ar[2 * i + 1] = -1;
	}
	for(int i = 0; i < M; i++){
		if(ar[2 * R[i][0]] == -1) ar[2 * R[i][0]] = i, beaulty[i][0] = 1;
		else if(ar[2 * R[i][0] + 1] == -1) ar[2 * R[i][0] + 1] = i, beaulty[i][0] = 2;
		if(ar[2 * R[i][1]] == -1) ar[2 * R[i][1]] = i, beaulty[i][1] = 1;
		else if(ar[2 * R[i][1] + 1] == -1) ar[2 * R[i][1] + 1] = i, beaulty[i][1] = 2;
	}
	for(int i = 0; i < M; i++){
		// printf("%d -- %d (%d)\n", R[i][0], R[i][1], i);
		// printf("%d -- %d\n", beaulty[i][0], beaulty[i][1]);
		if(beaulty[i][0] == 1 && beaulty[i][1] == 1){
			ar[2 * R[i][0]] = 2 * R[i][1] + 1;
			ar[2 * R[i][1]] = 2 * R[i][0] + 1;
		}
		else if(beaulty[i][0] == 2 && beaulty[i][1] == 1){
			ar[2 * R[i][0] + 1] = 2 * R[i][1] + 1;
			ar[2 * R[i][1]] = 2 * R[i][0];
		}
		else if(beaulty[i][0] == 1 && beaulty[i][1] == 2){
			ar[2 * R[i][0]] = 2 * R[i][1];
			ar[2 * R[i][1] + 1] = 2 * R[i][0] + 1;
		}
		else{
			if(beaulty[i][0] > 0)
				ar[2 * R[i][0] + (beaulty[i][0]) - 1] = 2 * R[i][1];
			if(beaulty[i][1] > 0)
				ar[2 * R[i][1] + (beaulty[i][1]) - 1] = 2 * R[i][0];
		}
	}
	for(int i = 0; i < N; i++){
		if(ar[2 * i] == -1)
			ar[2 * i] = ar[2 * i + 1]; 
		if(ar[2 * i + 1] == -1)
			ar[2 * i + 1] = ar[2 * i];
	}
	for(int i = 0; i < N; i++){
		rev[ar[2 * i]].push_back(2 * i);
		rev[ar[2 * i + 1]].push_back(2 * i + 1);
	}
	for(int i = 0; i < N; i++)
		in[2 * i] = rev[2 * i].size(), in[2 * i + 1] = rev[2 * i + 1].size();
	for(int i = 0; i < N; i++){
		// printf("%d.0 %d.%d\n%d.1 %d.%d\n", i, ar[2 * i] / 2, ar[2 * i] % 2, i, ar[2 * i + 1] / 2, ar[2 * i + 1] % 2);
	}
	getCycle();
	bfs(P);
	// for(int i = 0; i < N; i++){
	// 	printf("%d\n", dist[2 * i]);
	// }
	//printf("\n");
	// printf("%d\n", cycleSize);
	// for(int i = 0; i < 2 * n; i++){
	// 	if(!marc[i]) printf("%d.%d (%d.%d) ", i / 2, i % 2, ar[i] / 2, ar[i] % 2);
	// }
	// printf("\n");
	for(int i = 0; i < Q; i++){
		int ans = 0;
		for(int j = 0; j < N; j++){
			if(dist[2 * j] == -1) continue;
			if(dist[2 * j] <= G[i] && dist[2 * j] % cycleSize == G[i] % cycleSize) ans++;
		}
		answer(ans);
	}
}

void bfs(int ini){
	queue<int> fila;
	for(int i = 0; i < n; i++){
		dist[2 * i] = -1;
		dist[2 * i + 1] = -1;
	}
	dist[2 * ini] = 0;
	dist[2 * ini + 1] = 0;
	fila.push(2 * ini);
	fila.push(2 * ini + 1);
	while(!fila.empty()){
		int cur = fila.front();
		// printf("\t%d.%d\n", cur / 2, cur % 2);
		fila.pop();
		for(int i = 0; i < rev[cur].size(); i++){
			int viz = rev[cur][i];
			if(dist[viz] != -1) continue;
			fila.push(viz);
			dist[viz] = dist[cur] + 1;
		}
	}
}

void getCycle(){
	queue<int> fila;
	for(int i = 0; i < n; i++){
		if(in[2 * i] == 0) fila.push(2 * i);
		if(in[2 * i + 1] == 0) fila.push(2 * i + 1);
	}
	while(!fila.empty()){
		int cur = fila.front();
		marc[cur] = 1;
		fila.pop();
		int viz = ar[cur];
		if(marc[viz]) continue;
		in[viz]--;
		if(in[viz] == 0) fila.push(viz);
	}
	if(marc[2 * p] && marc[2 * p + 1]){
		cycleSize = 10 * MAXN;
		return;
	}
	int cur = (marc[2 * p]) ? 2 * p + 1 : 2 * p;
	while(marc[cur] == 0){
		marc[cur] = 1;
		cycleSize++;
		cur = ar[cur];
	}
}

Compilation message

garden.cpp: In function 'void bfs(int)':
garden.cpp:103:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i = 0; i < rev[cur].size(); i++){
                  ~~^~~~~~~~~~~~~~~~~

Subtask #1
49.0 / 49.0

# 결과 실행 시간 메모리 Grader output
1 Correct 8 ms 7552 KB Output is correct
2 Correct 9 ms 7552 KB Output is correct
3 Correct 9 ms 7552 KB Output is correct
4 Correct 8 ms 7424 KB Output is correct
5 Correct 8 ms 7424 KB Output is correct
6 Correct 9 ms 7552 KB Output is correct
7 Correct 9 ms 7424 KB Output is correct
8 Correct 9 ms 7552 KB Output is correct
9 Correct 10 ms 7552 KB Output is correct

Subtask #2
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 8 ms 7552 KB Output is correct
2 Correct 9 ms 7552 KB Output is correct
3 Correct 9 ms 7552 KB Output is correct
4 Correct 8 ms 7424 KB Output is correct
5 Correct 8 ms 7424 KB Output is correct
6 Correct 9 ms 7552 KB Output is correct
7 Correct 9 ms 7424 KB Output is correct
8 Correct 9 ms 7552 KB Output is correct
9 Correct 10 ms 7552 KB Output is correct
10 Correct 8 ms 7424 KB Output is correct
11 Correct 18 ms 9472 KB Output is correct
12 Correct 30 ms 10864 KB Output is correct
13 Incorrect 47 ms 16760 KB Output isn't correct
14 Halted 0 ms 0 KB -

Subtask #3
0 / 31.0

# 결과 실행 시간 메모리 Grader output
1 Correct 8 ms 7552 KB Output is correct
2 Correct 9 ms 7552 KB Output is correct
3 Correct 9 ms 7552 KB Output is correct
4 Correct 8 ms 7424 KB Output is correct
5 Correct 8 ms 7424 KB Output is correct
6 Correct 9 ms 7552 KB Output is correct
7 Correct 9 ms 7424 KB Output is correct
8 Correct 9 ms 7552 KB Output is correct
9 Correct 10 ms 7552 KB Output is correct
10 Correct 8 ms 7424 KB Output is correct
11 Correct 18 ms 9472 KB Output is correct
12 Correct 30 ms 10864 KB Output is correct
13 Incorrect 47 ms 16760 KB Output isn't correct
14 Halted 0 ms 0 KB -