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Submission #499395

# Submission time Handle Problem Language Result Execution time Memory
499395 2021-12-28T10:53:18 Z jansenkenpegrasio Portals (BOI14_portals) C++14
70 / 100
 1000 ms 9524 KB 
#include<stdio.h>
#include<utility>
#include<queue>
#define pp pair<int, pair<int, int> >
using namespace std;
int main()
{
	int R, C;
	scanf("%d%d", &R, &C);
	vector < vector <char> > board (R, vector <char> (C));
	pair <int, int> start, cake;
	vector < vector <int> > tembok(R, vector <int> (C, 1e9));
	for (int i = 0; i < R; i++)
	{
		for (int j = 0; j < C; j++)
		{
			if (i == 0 || i == R - 1 || j == 0 || j == C - 1)
			{
				tembok[i][j] = 1;
			}
		}
	}
	for (int i = 0; i < R; i++)
	{
		for (int j = 0; j < C; j++)
		{
			scanf(" %c", &board[i][j]);
			if (board[i][j] == 'S')
				start = make_pair(i, j);
			if (board[i][j] == 'C')
				cake = make_pair(i, j);
			if (board[i][j] == '#')
				tembok[i][j] = 0;
		}
	}
//	1. Cari untuk setiap titik, jarak terdekat dengan temboknya berapa?
	for (int i = 0; i < R; i++)
	{
		for (int j = 1; j < C; j++)
		{
			tembok[i][j] = min(tembok[i][j], tembok[i][j - 1] + 1);
		}
	}
	for (int i = 1; i < R; i++)
	{
		for (int j = 0; j < C; j++)
		{
			tembok[i][j] = min(tembok[i][j], tembok[i - 1][j] + 1);
		}
	}
	for (int i = 0; i < R; i++)
	{
		for (int j = C - 2; j >= 0; j--)
		{
			tembok[i][j] = min(tembok[i][j], tembok[i][j + 1] + 1);
		}
	}
	for (int i = R - 2; i >= 0; i--)
	{
		for (int j = 0; j < C; j++)
		{
			tembok[i][j] = min(tembok[i][j], tembok[i + 1][j] + 1);
		}
	}
	priority_queue<pp, vector <pp>, greater <pp> > djikstra;
	vector <vector <int> > distance(R, vector <int> (C, 1e9));
//	first -> jarak, second.first -> x, second.second
	djikstra.push(make_pair(0, make_pair(start.first, start.second)));
	distance[start.first][start.second] = 0;
	while (!djikstra.empty())
	{
		int weight = djikstra.top().first;
		int x = djikstra.top().second.first;
		int y = djikstra.top().second.second;
//		printf("wxy %d %d %d\n", weight, x, y);
		djikstra.pop();
		if (x >= R || y >= C || x < 0 || y < 0)
			continue;
//		printf("A");
		if (board[x][y] == '#')
			continue;
//		printf("B");
		if (weight != distance[x][y])
			continue;
//		printf("C\n");
//		1. Kiri kanan atas bawah
		if (x + 1 < R && distance[x + 1][y] > weight + 1)
		{
			djikstra.push(make_pair(weight + 1, make_pair(x + 1, y)));
			distance[x + 1][y] = min(distance[x + 1][y], weight + 1);
		}
//		printf("91\n");
		if (y + 1 < C && distance[x][y + 1] > weight + 1)
		{
			djikstra.push(make_pair(weight + 1, make_pair(x, y + 1)));
			distance[x][y + 1] = min(distance[x][y + 1], weight + 1);
		}
//		printf("97\n");
		if (x - 1 >= 0 && distance[x - 1][y] > weight + 1)
		{
			djikstra.push(make_pair(weight + 1, make_pair(x - 1, y)));
			distance[x - 1][y] = min(distance[x - 1][y], weight + 1);
		}
		if (y - 1 >= 0 && distance[x][y - 1] > weight + 1)
		{
			djikstra.push(make_pair(weight + 1, make_pair(x, y - 1)));
			distance[x][y - 1] = min(distance[x][y - 1], weight + 1);
		}
//		printf("106\n");
//		2. Nembak portal biru masuk lewat tembok terdekat
//		a. Arah Bawah
		int temp_x = x; // inget x itu berhubungannya dengan baris
		while (temp_x != R && board[temp_x][y] != '#')
		{
			temp_x++;
		}
		if (distance[temp_x - 1][y] > weight + tembok[x][y])
		{
			djikstra.push(make_pair(weight + tembok[x][y], make_pair(temp_x - 1, y)));
			distance[temp_x - 1][y] = min(distance[temp_x - 1][y], weight + tembok[x][y]);
		}
//		printf("Bawah");
//		b. Arah atas
		temp_x = x;
		while (temp_x != -1 && board[temp_x][y] != '#')
		{
			temp_x--;
		}
//		printf("Atas\n");
		if (distance[temp_x + 1][y] > weight + tembok[x][y])
		{
			djikstra.push(make_pair(weight + tembok[x][y], make_pair(temp_x + 1, y)));
			distance[temp_x + 1][y] = min(distance[temp_x + 1][y], weight + tembok[x][y]);
		}
//		c. Arah kanan
		int temp_y = y;
		while (temp_y != C && board[x][temp_y] != '#')
		{
			temp_y++;
		}
//		printf("Kanan\n");
		if (distance[x][temp_y - 1] > weight + tembok[x][y])
		{
			djikstra.push(make_pair(weight + tembok[x][y], make_pair(x, temp_y - 1)));
			distance[x][temp_y - 1] = min(distance[x][temp_y - 1], weight + tembok[x][y]);
		}
//		d. Arah Kiri
		temp_y = y;
		while (temp_y != -1 && board[x][temp_y] != '#')
		{
			temp_y--;
		}
//		printf("Kiri\n");
		if (distance[x][temp_y + 1] > weight + tembok[x][y])
		{
			djikstra.push(make_pair(weight + tembok[x][y], make_pair(x, temp_y + 1)));
			distance[x][temp_y + 1] = min(distance[x][temp_y + 1], weight + tembok[x][y]);
		}
	}
	printf("%d\n", distance[cake.first][cake.second]);
}

Compilation message

portals.cpp: In function 'int main()':
portals.cpp:9:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
    9 |  scanf("%d%d", &R, &C);
      |  ~~~~~^~~~~~~~~~~~~~~~
portals.cpp:27:9: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   27 |    scanf(" %c", &board[i][j]);
      |    ~~~~~^~~~~~~~~~~~~~~~~~~~~

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 0 ms 204 KB Output is correct
10 Correct 0 ms 204 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 0 ms 204 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 0 ms 204 KB Output is correct

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 8 ms 644 KB Output is correct
6 Correct 12 ms 668 KB Output is correct
7 Correct 12 ms 672 KB Output is correct
8 Correct 6 ms 652 KB Output is correct

Subtask #4
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 8 ms 588 KB Output is correct
15 Correct 11 ms 620 KB Output is correct
16 Correct 10 ms 668 KB Output is correct
17 Correct 9 ms 672 KB Output is correct
18 Correct 14 ms 696 KB Output is correct
19 Correct 18 ms 696 KB Output is correct
20 Correct 29 ms 696 KB Output is correct
21 Correct 7 ms 588 KB Output is correct
22 Correct 8 ms 588 KB Output is correct
23 Correct 10 ms 588 KB Output is correct
24 Correct 16 ms 588 KB Output is correct
25 Correct 0 ms 204 KB Output is correct
26 Correct 1 ms 204 KB Output is correct
27 Correct 0 ms 204 KB Output is correct
28 Correct 6 ms 648 KB Output is correct

Subtask #5
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 7 ms 656 KB Output is correct
15 Correct 12 ms 588 KB Output is correct
16 Correct 9 ms 668 KB Output is correct
17 Correct 10 ms 672 KB Output is correct
18 Correct 13 ms 668 KB Output is correct
19 Correct 18 ms 588 KB Output is correct
20 Correct 17 ms 588 KB Output is correct
21 Correct 7 ms 648 KB Output is correct
22 Correct 8 ms 656 KB Output is correct
23 Correct 8 ms 588 KB Output is correct
24 Correct 229 ms 9328 KB Output is correct
25 Execution timed out 1098 ms 9524 KB Time limit exceeded
26 Halted 0 ms 0 KB -