oj.uz

Submission #529700

# Submission time Handle Problem Language Result Execution time Memory
529700 2022-02-23T13:17:28 Z c28dnv9q3 Nautilus (BOI19_nautilus) C++17
66 / 100
 27 ms 2948 KB 
#include <vector>
#include <iostream>
#define MAXN 210

char commands[MAXN];
char map[MAXN][MAXN];
char dp[MAXN][MAXN][MAXN];
int R, C, M;

struct pos {
	int x, y;
};

bool recurse(pos p, int a) {
	if (dp[p.x+1][p.y+1][a + 1] != 0) {
		return dp[p.x+1][p.y+1][a + 1] == 2;
	}
	if (p.x < 0 || p.y < 0 || p.x >= R || p.y >= C || map[p.x][p.y] != '.') {
		dp[p.x + 1][p.y + 1][a + 1] = 1;
		return false;
	}
	if (a == -1) {
		return map[p.x][p.y] == '.';
	} else {
		bool r = false;
		switch (commands[a]) {
		case 0:p.x++; r = recurse(p, a - 1); p.x--; break;
		case 1:p.x--; r = recurse(p, a - 1); p.x++; break;
		case 2:p.y--; r = recurse(p, a - 1); p.y++; break;
		case 3:p.y++; r = recurse(p, a - 1); p.y--; break;
		case 4: {
			bool b = false;
			p.x++;
			b = recurse(p, a - 1) || b;
			p.x -= 2;
			b = recurse(p, a - 1) || b;
			p.x++;
			p.y--;
			b = recurse(p, a - 1) || b;
			p.y += 2;
			b = recurse(p, a - 1) || b;
			p.y--;
			r = b;
		}
		}
		dp[p.x + 1][p.y + 1][a + 1] = r ? 2 : 1;
		return r;
	}
}

int main() {
	scanf("%d%d%d", &R, &C, &M);
	getchar();
	for (int i = 0; i < R; i++) {
		for (int j = 0; j < C; j++) {
			char x;
			x = getchar();
			map[i][j] = x;
		}
		getchar();
	}
	for (int i = 0; i < M; i++) {
		char c = getchar();
		int x = -1;
		switch (c) {
		case 'N': x = 0; break;
		case 'S': x = 1; break;
		case 'E': x = 2; break;
		case 'W': x = 3; break;
		case '?': x = 4; break;
		}
		commands[i] = x;
	}

	int counter = 0;
	for (int i = 0; i < R; i++) {
		for (int j = 0; j < C; j++) {
			if (map[i][j] == '.' && recurse({ i,j },M-1)) {
				counter++;
			}
		}
	}
	std::cout << counter;
	return 0;
}

Compilation message

nautilus.cpp: In function 'int main()':
nautilus.cpp:52:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   52 |  scanf("%d%d%d", &R, &C, &M);
      |  ~~~~~^~~~~~~~~~~~~~~~~~~~~~

Subtask #1
29.0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 16 ms 2764 KB Output is correct
2 Correct 3 ms 2764 KB Output is correct
3 Correct 2 ms 2732 KB Output is correct
4 Correct 2 ms 2732 KB Output is correct
5 Correct 2 ms 2616 KB Output is correct
6 Correct 1 ms 332 KB Output is correct

Subtask #2
37.0 / 37.0

# Verdict Execution time Memory Grader output
1 Correct 16 ms 2764 KB Output is correct
2 Correct 3 ms 2764 KB Output is correct
3 Correct 2 ms 2732 KB Output is correct
4 Correct 2 ms 2732 KB Output is correct
5 Correct 2 ms 2616 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 25 ms 2948 KB Output is correct
8 Correct 5 ms 2764 KB Output is correct
9 Correct 2 ms 2764 KB Output is correct
10 Correct 2 ms 2612 KB Output is correct
11 Correct 1 ms 308 KB Output is correct
12 Correct 27 ms 2868 KB Output is correct
13 Correct 25 ms 2768 KB Output is correct
14 Correct 19 ms 2812 KB Output is correct
15 Correct 3 ms 2764 KB Output is correct
16 Correct 1 ms 332 KB Output is correct
17 Correct 27 ms 2764 KB Output is correct
18 Correct 27 ms 2776 KB Output is correct
19 Correct 12 ms 2764 KB Output is correct
20 Correct 6 ms 2764 KB Output is correct
21 Correct 1 ms 332 KB Output is correct

Subtask #3
0 / 34.0

# Verdict Execution time Memory Grader output
1 Correct 16 ms 2764 KB Output is correct
2 Correct 3 ms 2764 KB Output is correct
3 Correct 2 ms 2732 KB Output is correct
4 Correct 2 ms 2732 KB Output is correct
5 Correct 2 ms 2616 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 25 ms 2948 KB Output is correct
8 Correct 5 ms 2764 KB Output is correct
9 Correct 2 ms 2764 KB Output is correct
10 Correct 2 ms 2612 KB Output is correct
11 Correct 1 ms 308 KB Output is correct
12 Correct 27 ms 2868 KB Output is correct
13 Correct 25 ms 2768 KB Output is correct
14 Correct 19 ms 2812 KB Output is correct
15 Correct 3 ms 2764 KB Output is correct
16 Correct 1 ms 332 KB Output is correct
17 Correct 27 ms 2764 KB Output is correct
18 Correct 27 ms 2776 KB Output is correct
19 Correct 12 ms 2764 KB Output is correct
20 Correct 6 ms 2764 KB Output is correct
21 Correct 1 ms 332 KB Output is correct
22 Runtime error 3 ms 692 KB Execution killed with signal 11
23 Halted 0 ms 0 KB -