답안 #907385

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
907385	2024-01-15T13:03:41 Z	daoquanglinh2007	Bomb (IZhO17_bomb)	C++17	100 / 100	216 ms	104688 KB

bomb

#include <bits/stdc++.h>
using namespace std;
 
const int NM = 2500, inf = 1e9+7;
 
int N, M, Up[NM+5][NM+5], Down[NM+5][NM+5], Left[NM+5][NM+5], Right[NM+5][NM+5], H = +inf, W = +inf;
int mx[NM+5], ans = 0;
char a[NM+5][NM+5];

void preprocess(){
	for (int i = 1; i <= N; i++)
		for (int j = 1; j <= M; j++)
			if (a[i][j] == '1'){
				Up[i][j] = Up[i-1][j]+1;
				Left[i][j] = Left[i][j-1]+1;
			}
	for (int i = N; i >= 1; i--)
		for (int j = M; j >= 1; j--)
			if (a[i][j] == '1'){
				Down[i][j] = Down[i+1][j]+1;
				Right[i][j] = Right[i][j+1]+1;
				
				H = min(H, Up[i][j]+Down[i][j]-1);
				W = min(W, Left[i][j]+Right[i][j]-1);
			}
			
	for (int i = 1; i <= H; i++) mx[i] = W;
}

int main(){
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);
	
	cin >> N >> M;
	for (int i = 1; i <= N; i++)
		for (int j = 1; j <= M; j++)
			cin >> a[i][j];
			
	preprocess();
	for (int i = 1; i <= N; i++)
		for (int j = 1; j <= M; j++){
			if (Down[i][j] == 1){
				int l = -inf, r = +inf;
				for (int k = 1; k <= H; k++){
					if (i-k+1 < 1) continue;
					l = max(l, j-Left[i-k+1][j]+1);
					r = min(r, j+Right[i-k+1][j]-1);
					mx[k] = min(mx[k], r-l+1);
				}
			}
			if (Up[i][j] == 1){
				int l = -inf, r = +inf;
				for (int k = 1; k <= H; k++){
					if (i+k-1 > N) continue;
					l = max(l, j-Left[i+k-1][j]+1);
					r = min(r, j+Right[i+k-1][j]-1);
					mx[k] = min(mx[k], r-l+1);
				}
			}
		}
	for (int i = 1; i <= H; i++) ans = max(ans, i*mx[i]);
	cout << ans;
	return 0;
}

Subtask #1

100.0 / 100.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	344 KB	Output is correct
2	Correct	1 ms	604 KB	Output is correct
3	Correct	20 ms	73308 KB	Output is correct
4	Correct	18 ms	73308 KB	Output is correct
5	Correct	1 ms	348 KB	Output is correct
6	Correct	1 ms	348 KB	Output is correct
7	Correct	1 ms	344 KB	Output is correct
8	Correct	1 ms	600 KB	Output is correct
9	Correct	1 ms	604 KB	Output is correct
10	Correct	1 ms	620 KB	Output is correct
11	Correct	1 ms	604 KB	Output is correct
12	Correct	1 ms	604 KB	Output is correct
13	Correct	1 ms	600 KB	Output is correct
14	Correct	1 ms	604 KB	Output is correct
15	Correct	1 ms	600 KB	Output is correct
16	Correct	1 ms	860 KB	Output is correct
17	Correct	1 ms	5468 KB	Output is correct
18	Correct	1 ms	3164 KB	Output is correct
19	Correct	2 ms	7512 KB	Output is correct
20	Correct	2 ms	7516 KB	Output is correct
21	Correct	1 ms	860 KB	Output is correct
22	Correct	2 ms	5208 KB	Output is correct
23	Correct	2 ms	7512 KB	Output is correct
24	Correct	2 ms	7516 KB	Output is correct
25	Correct	2 ms	7772 KB	Output is correct
26	Correct	3 ms	8024 KB	Output is correct
27	Correct	5 ms	14172 KB	Output is correct
28	Correct	3 ms	7256 KB	Output is correct
29	Correct	6 ms	15708 KB	Output is correct
30	Correct	6 ms	15848 KB	Output is correct
31	Correct	5 ms	9564 KB	Output is correct
32	Correct	6 ms	13916 KB	Output is correct
33	Correct	8 ms	15484 KB	Output is correct
34	Correct	3 ms	7516 KB	Output is correct
35	Correct	4 ms	7516 KB	Output is correct
36	Correct	8 ms	19220 KB	Output is correct
37	Correct	1 ms	856 KB	Output is correct
38	Correct	216 ms	104684 KB	Output is correct
39	Correct	1 ms	600 KB	Output is correct
40	Correct	33 ms	39420 KB	Output is correct
41	Correct	1 ms	600 KB	Output is correct
42	Correct	2 ms	8028 KB	Output is correct
43	Correct	135 ms	100564 KB	Output is correct
44	Correct	8 ms	17756 KB	Output is correct
45	Correct	179 ms	102816 KB	Output is correct
46	Correct	160 ms	104688 KB	Output is correct
47	Correct	178 ms	103048 KB	Output is correct
48	Correct	108 ms	104496 KB	Output is correct
49	Correct	105 ms	104532 KB	Output is correct
50	Correct	111 ms	104532 KB	Output is correct
51	Correct	107 ms	104568 KB	Output is correct
52	Correct	109 ms	104528 KB	Output is correct
53	Correct	111 ms	104112 KB	Output is correct
54	Correct	97 ms	89404 KB	Output is correct
55	Correct	97 ms	86864 KB	Output is correct
56	Correct	215 ms	104564 KB	Output is correct
57	Correct	106 ms	78204 KB	Output is correct
58	Correct	97 ms	89684 KB	Output is correct
59	Correct	96 ms	84560 KB	Output is correct
60	Correct	100 ms	95860 KB	Output is correct
61	Correct	114 ms	104532 KB	Output is correct
62	Correct	153 ms	104528 KB	Output is correct
63	Correct	174 ms	104532 KB	Output is correct
64	Correct	100 ms	89936 KB	Output is correct
65	Correct	108 ms	103760 KB	Output is correct
66	Correct	104 ms	102008 KB	Output is correct
67	Correct	107 ms	104616 KB	Output is correct
68	Correct	109 ms	104532 KB	Output is correct
69	Correct	106 ms	75384 KB	Output is correct
70	Correct	68 ms	34900 KB	Output is correct
71	Correct	114 ms	67660 KB	Output is correct
72	Correct	124 ms	75092 KB	Output is correct
73	Correct	131 ms	74068 KB	Output is correct
74	Correct	132 ms	81544 KB	Output is correct
75	Correct	149 ms	85840 KB	Output is correct
76	Correct	148 ms	90236 KB	Output is correct
77	Correct	139 ms	89360 KB	Output is correct
78	Correct	140 ms	90492 KB	Output is correct
79	Correct	72 ms	25208 KB	Output is correct
80	Correct	76 ms	30332 KB	Output is correct
81	Correct	76 ms	31352 KB	Output is correct
82	Correct	147 ms	92544 KB	Output is correct
83	Correct	149 ms	94068 KB	Output is correct
84	Correct	66 ms	11604 KB	Output is correct
85	Correct	127 ms	91568 KB	Output is correct
86	Correct	105 ms	103764 KB	Output is correct
87	Correct	121 ms	91520 KB	Output is correct
88	Correct	146 ms	91568 KB	Output is correct
89	Correct	107 ms	99412 KB	Output is correct
90	Correct	82 ms	74072 KB	Output is correct
91	Correct	125 ms	95504 KB	Output is correct
92	Correct	123 ms	96884 KB	Output is correct
93	Correct	104 ms	103252 KB	Output is correct
94	Correct	103 ms	97644 KB	Output is correct
95	Correct	153 ms	93776 KB	Output is correct
96	Correct	152 ms	92864 KB	Output is correct
97	Correct	111 ms	103800 KB	Output is correct
98	Correct	138 ms	92308 KB	Output is correct
99	Correct	108 ms	96848 KB	Output is correct
100	Correct	104 ms	103248 KB	Output is correct