oj.uz

Submission #414688

# Submission time Handle Problem Language Result Execution time Memory
414688 2021-05-31T03:59:33 Z milleniumEeee Nautilus (BOI19_nautilus) C++11
66 / 100
 1000 ms 2508 KB 
#pragma GCC target ("avx2")
#pragma GCC optimization ("O3")
#pragma GCC optimization ("unroll-loops")
#include <bits/stdc++.h>
#define prev prevw313131313
#define next next131313131
#define pb push_back
using namespace std;

const int MAXN = 505;

char tp[MAXN][MAXN];
int dp[2][MAXN][MAXN];
int used_id = 1;

int toY[] = {-1, 0, 1, 0};
int toX[] = {0, 1, 0, -1};

bool in(int y, int x, int r, int c) {
	return 1 <= y && y <= r && 1 <= x && x <= c;
}

int pos[1000];
bool possible[4];

signed main() {
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	int r, c, m;
	cin >> r >> c >> m;
	pos['N'] = 0;
	pos['E'] = 1;
	pos['S'] = 2;
	pos['W'] = 3;
	for (int i = 1; i <= r; i++) {
		for (int j = 1; j <= c; j++) {
			cin >> tp[i][j];
		}
	}
	string mp;
	cin >> mp;
	mp = ' ' + mp;
	for (int i = 1; i <= r; i++) {
		for (int j = 1; j <= c; j++) {
			if (tp[i][j] == '.') {
				dp[0][i][j] = used_id;
			}
		}
	}
	// 0 moves
	for (int step = 1; step <= m; step++) {
		int prev = ((step - 1) & 1);
		int cur = (step & 1);
		for (int k = 0; k < 4; k++) {
			possible[k] = 0;
		}
		if (mp[step] == '?') {
			for (int k = 0; k < 4; k++) {
				possible[k] = 1;
			}
		} else {
			possible[pos[mp[step]]] = 1;
		}
		for (int y = 1; y <= r; y++) {
			for (int x = 1; x <= c; x++) {
				if (dp[prev][y][x] == used_id) {
					for (int cc = 0; cc < 4; cc++) {
						if (!possible[cc]) {
							continue;
						}
						int nY = y + toY[cc];
						int nX = x + toX[cc];
						if (in(nY, nX, r, c) && tp[nY][nX] == '.') {
							dp[cur][nY][nX] = used_id + 1;
						}
					}
				}
			}
		}
		used_id++;
	}
	int ans = 0;
	for (int y = 1; y <= r; y++) {
		for (int x = 1; x <= c; x++) {
			ans += (dp[(m & 1)][y][x] == used_id);
		}
	}
	cout << ans << endl;
}

/*
5 9 7
...##....
..#.##..#
..#....##
.##...#..
....#....
WS?EE??
*/

Compilation message

nautilus.cpp:2: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas]
    2 | #pragma GCC optimization ("O3")
      | 
nautilus.cpp:3: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas]
    3 | #pragma GCC optimization ("unroll-loops")
      | 
nautilus.cpp: In function 'int main()':
nautilus.cpp:62:25: warning: array subscript has type 'char' [-Wchar-subscripts]
   62 |    possible[pos[mp[step]]] = 1;
      |                         ^

Subtask #1
29.0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 716 KB Output is correct
2 Correct 3 ms 872 KB Output is correct
3 Correct 3 ms 776 KB Output is correct
4 Correct 3 ms 716 KB Output is correct
5 Correct 3 ms 780 KB Output is correct
6 Correct 2 ms 332 KB Output is correct

Subtask #2
37.0 / 37.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 716 KB Output is correct
2 Correct 3 ms 872 KB Output is correct
3 Correct 3 ms 776 KB Output is correct
4 Correct 3 ms 716 KB Output is correct
5 Correct 3 ms 780 KB Output is correct
6 Correct 2 ms 332 KB Output is correct
7 Correct 13 ms 780 KB Output is correct
8 Correct 7 ms 716 KB Output is correct
9 Correct 4 ms 788 KB Output is correct
10 Correct 3 ms 716 KB Output is correct
11 Correct 3 ms 332 KB Output is correct
12 Correct 21 ms 776 KB Output is correct
13 Correct 20 ms 780 KB Output is correct
14 Correct 17 ms 780 KB Output is correct
15 Correct 3 ms 716 KB Output is correct
16 Correct 2 ms 332 KB Output is correct
17 Correct 26 ms 716 KB Output is correct
18 Correct 25 ms 780 KB Output is correct
19 Correct 14 ms 776 KB Output is correct
20 Correct 8 ms 716 KB Output is correct
21 Correct 3 ms 332 KB Output is correct

Subtask #3
0 / 34.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 716 KB Output is correct
2 Correct 3 ms 872 KB Output is correct
3 Correct 3 ms 776 KB Output is correct
4 Correct 3 ms 716 KB Output is correct
5 Correct 3 ms 780 KB Output is correct
6 Correct 2 ms 332 KB Output is correct
7 Correct 13 ms 780 KB Output is correct
8 Correct 7 ms 716 KB Output is correct
9 Correct 4 ms 788 KB Output is correct
10 Correct 3 ms 716 KB Output is correct
11 Correct 3 ms 332 KB Output is correct
12 Correct 21 ms 776 KB Output is correct
13 Correct 20 ms 780 KB Output is correct
14 Correct 17 ms 780 KB Output is correct
15 Correct 3 ms 716 KB Output is correct
16 Correct 2 ms 332 KB Output is correct
17 Correct 26 ms 716 KB Output is correct
18 Correct 25 ms 780 KB Output is correct
19 Correct 14 ms 776 KB Output is correct
20 Correct 8 ms 716 KB Output is correct
21 Correct 3 ms 332 KB Output is correct
22 Execution timed out 1098 ms 2508 KB Time limit exceeded
23 Halted 0 ms 0 KB -