답안 #43151

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
43151 2018-03-09T15:02:01 Z cheater2k Bomb (IZhO17_bomb) C++14
100 / 100
822 ms 131072 KB
/*
5 5 
00111
00111
11111
11110
11100
*/
#include <bits/stdc++.h>
using namespace std;

#define left __left
#define right __right

const int N = 2505;

int n, m, nrow, ncol;
int left[N][N];
int right[N][N];
int up[N][N];
int down[N][N];
char a[N][N];
int c[N];

int main() {
	ios_base::sync_with_stdio(false); cin.tie(0);
	cin >> n >> m;
	for (int i = 1; i <= n; ++i) {
		for (int j = 1; j <= m; ++j) {
			cin >> a[i][j];
		}
	}

	for (int i = 1; i <= n; ++i) {
		for (int j = 1; j <= m; ++j) left[i][j] = a[i][j] == '1' ? left[i][j - 1] + 1 : 0;
		for (int j = m; j >= 1; --j) right[i][j] = a[i][j] == '1' ? right[i][j + 1] + 1 : 0;
	}

	for (int j = 1; j <= m; ++j) {
		for (int i = 1; i <= n; ++i) up[i][j] = a[i][j] == '1' ? up[i - 1][j] + 1 : 0;
		for (int i = n; i >= 1; --i) down[i][j] = a[i][j] == '1' ? down[i + 1][j] + 1 : 0;
	}

	nrow = n, ncol = m;
	for (int i = 1; i <= n; ++i) {
		for (int j = 1; j <= m; ++j) if (a[i][j] == '1') {
			nrow = min(nrow, up[i][j] + down[i][j] - 1);
			ncol = min(ncol, left[i][j] + right[i][j] - 1);
		}
	}

	int res = 0;
	for (int r = 1; r <= nrow; ++r) c[r] = ncol;

	for (int i = 1; i <= n; ++i) for (int j = 1; j <= m; ++j) {
		if (a[i][j] != '1') continue;

		int minleft = ncol;
		int minright = ncol;
		if (down[i][j] == 1) {
			for (int k = i; k >= i - nrow + 1; --k) {
				minleft = min(minleft, left[k][j]);
				minright = min(minright, right[k][j]);
				c[i - k + 1] = min(c[i - k + 1], minleft + minright - 1);
			}
		}

		minleft = minright = ncol;
		if (up[i][j] == 1) {
			for (int k = i; k <= i + nrow - 1; ++k) {
				minleft = min(minleft, left[k][j]);
				minright = min(minright, right[k][j]);
				c[k - i + 1] = min(c[k - i + 1], minleft + minright - 1);
			}
		}
	}

	for (int r = 1; r <= nrow; ++r) res = max(res, r * c[r]);
	cout << res << endl;
}
# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 376 KB Output is correct
2 Correct 2 ms 740 KB Output is correct
3 Correct 36 ms 46640 KB Output is correct
4 Correct 36 ms 46668 KB Output is correct
5 Correct 2 ms 46668 KB Output is correct
6 Correct 2 ms 46668 KB Output is correct
7 Correct 2 ms 46668 KB Output is correct
8 Correct 2 ms 46668 KB Output is correct
9 Correct 2 ms 46668 KB Output is correct
10 Correct 1 ms 46668 KB Output is correct
11 Correct 2 ms 46668 KB Output is correct
12 Correct 2 ms 46668 KB Output is correct
13 Correct 2 ms 46668 KB Output is correct
14 Correct 2 ms 46668 KB Output is correct
15 Correct 2 ms 46668 KB Output is correct
16 Correct 2 ms 46668 KB Output is correct
17 Correct 2 ms 46668 KB Output is correct
18 Correct 2 ms 46668 KB Output is correct
19 Correct 4 ms 46668 KB Output is correct
20 Correct 3 ms 46668 KB Output is correct
21 Correct 2 ms 46668 KB Output is correct
22 Correct 3 ms 46668 KB Output is correct
23 Correct 3 ms 46668 KB Output is correct
24 Correct 3 ms 46668 KB Output is correct
25 Correct 3 ms 46668 KB Output is correct
26 Correct 3 ms 46668 KB Output is correct
27 Correct 12 ms 46668 KB Output is correct
28 Correct 9 ms 46668 KB Output is correct
29 Correct 11 ms 46668 KB Output is correct
30 Correct 19 ms 46668 KB Output is correct
31 Correct 15 ms 46668 KB Output is correct
32 Correct 13 ms 46668 KB Output is correct
33 Correct 16 ms 46668 KB Output is correct
34 Correct 8 ms 46668 KB Output is correct
35 Correct 13 ms 46668 KB Output is correct
36 Correct 17 ms 46668 KB Output is correct
37 Correct 2 ms 46668 KB Output is correct
38 Correct 776 ms 112820 KB Output is correct
39 Correct 2 ms 112820 KB Output is correct
40 Correct 68 ms 112820 KB Output is correct
41 Correct 2 ms 112820 KB Output is correct
42 Correct 3 ms 112820 KB Output is correct
43 Correct 486 ms 119708 KB Output is correct
44 Correct 16 ms 119708 KB Output is correct
45 Correct 580 ms 125800 KB Output is correct
46 Correct 516 ms 131072 KB Output is correct
47 Correct 590 ms 131072 KB Output is correct
48 Correct 452 ms 131072 KB Output is correct
49 Correct 466 ms 131072 KB Output is correct
50 Correct 442 ms 131072 KB Output is correct
51 Correct 437 ms 131072 KB Output is correct
52 Correct 482 ms 131072 KB Output is correct
53 Correct 447 ms 131072 KB Output is correct
54 Correct 448 ms 131072 KB Output is correct
55 Correct 436 ms 131072 KB Output is correct
56 Correct 822 ms 131072 KB Output is correct
57 Correct 446 ms 131072 KB Output is correct
58 Correct 433 ms 131072 KB Output is correct
59 Correct 452 ms 131072 KB Output is correct
60 Correct 439 ms 131072 KB Output is correct
61 Correct 465 ms 131072 KB Output is correct
62 Correct 546 ms 131072 KB Output is correct
63 Correct 608 ms 131072 KB Output is correct
64 Correct 446 ms 131072 KB Output is correct
65 Correct 437 ms 131072 KB Output is correct
66 Correct 432 ms 131072 KB Output is correct
67 Correct 443 ms 131072 KB Output is correct
68 Correct 454 ms 131072 KB Output is correct
69 Correct 428 ms 131072 KB Output is correct
70 Correct 294 ms 131072 KB Output is correct
71 Correct 455 ms 131072 KB Output is correct
72 Correct 507 ms 131072 KB Output is correct
73 Correct 537 ms 131072 KB Output is correct
74 Correct 484 ms 131072 KB Output is correct
75 Correct 483 ms 131072 KB Output is correct
76 Correct 500 ms 131072 KB Output is correct
77 Correct 503 ms 131072 KB Output is correct
78 Correct 500 ms 131072 KB Output is correct
79 Correct 427 ms 131072 KB Output is correct
80 Correct 416 ms 131072 KB Output is correct
81 Correct 417 ms 131072 KB Output is correct
82 Correct 504 ms 131072 KB Output is correct
83 Correct 530 ms 131072 KB Output is correct
84 Correct 411 ms 131072 KB Output is correct
85 Correct 478 ms 131072 KB Output is correct
86 Correct 460 ms 131072 KB Output is correct
87 Correct 460 ms 131072 KB Output is correct
88 Correct 506 ms 131072 KB Output is correct
89 Correct 456 ms 131072 KB Output is correct
90 Correct 293 ms 131072 KB Output is correct
91 Correct 451 ms 131072 KB Output is correct
92 Correct 454 ms 131072 KB Output is correct
93 Correct 452 ms 131072 KB Output is correct
94 Correct 474 ms 131072 KB Output is correct
95 Correct 497 ms 131072 KB Output is correct
96 Correct 495 ms 131072 KB Output is correct
97 Correct 487 ms 131072 KB Output is correct
98 Correct 488 ms 131072 KB Output is correct
99 Correct 469 ms 131072 KB Output is correct
100 Correct 453 ms 131072 KB Output is correct