답안 #936263

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
936263	2024-03-01T13:46:28 Z	guagua0407	Bomb (IZhO17_bomb)	C++17	90 / 100	191 ms	60056 KB

bomb

#include <bits/stdc++.h>
using namespace std;

const int mxN=2500;
int n, m, mxw=mxN, mxh=mxN, u[mxN][mxN], d[mxN][mxN], a[mxN], ans;
string g[mxN];

int main() {
	ios::sync_with_stdio(0);
	cin.tie(0);

	cin >> n >> m;
	for(int i=0; i<n; ++i) {
		cin >> g[i];
		for(int j=0, w=0; j<m; ++j) {
			w=g[i][j]&1?w+1:0;
			if(w&&(j+1>=m||g[i][j+1]&1^1))
				mxw=min(w, mxw);
		}
	}
	for(int j=0; j<m; ++j) {
		for(int i=0, h=0; i<n; ++i) {
			h=g[i][j]&1?h+1:0;
			if(h&&(i+1>=n||g[i+1][j]&1^1))
				mxh=min(h, mxh);
			u[i][j]=i&&g[i-1][j]&1?u[i-1][j]:i;
		}
		for(int i=n-1; ~i; --i)
			d[i][j]=i<n-1&&g[i+1][j]&1?d[i+1][j]:i;
	}
	for(int i=0; i<mxw; ++i)
		a[i]=1e9;
	auto c=[]() {
		for(int i=0; i<n; ++i) {
			for(int j=0; j<m; ++j) {
				if(j&&g[i][j-1]&1||g[i][j]&1^1)
					continue;
				for(int k=0, l=0, r=n; k<mxw; ++k) {
					l=max(u[i][j+k], l);
					r=min(d[i][j+k], r);
					a[k]=min(r-l+1, a[k]);
				}
			}
		}
	};
	c();
	for(int i=0; i<n; ++i) {
		reverse(g[i].begin(), g[i].end());
		reverse(u[i], u[i]+m);
		reverse(d[i], d[i]+m);
	}
	c();
	for(int i=0; i<mxw; ++i)
		ans=max((i+1)*a[i], ans);
	cout << ans;
}

Compilation message

bomb.cpp: In function 'int main()':
bomb.cpp:17:28: warning: suggest parentheses around arithmetic in operand of '^' [-Wparentheses]
   17 |    if(w&&(j+1>=m||g[i][j+1]&1^1))
bomb.cpp:24:28: warning: suggest parentheses around arithmetic in operand of '^' [-Wparentheses]
   24 |    if(h&&(i+1>=n||g[i+1][j]&1^1))
bomb.cpp: In lambda function:
bomb.cpp:36:31: warning: suggest parentheses around arithmetic in operand of '^' [-Wparentheses]
   36 |     if(j&&g[i][j-1]&1||g[i][j]&1^1)
bomb.cpp:36:9: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   36 |     if(j&&g[i][j-1]&1||g[i][j]&1^1)
      |        ~^~~~~~~~~~~~~

Subtask #1

90.0 / 100.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	2392 KB	Output is correct
2	Correct	2 ms	4444 KB	Output is correct
3	Correct	9 ms	37564 KB	Output is correct
4	Correct	7 ms	36188 KB	Output is correct
5	Correct	1 ms	2396 KB	Output is correct
6	Correct	1 ms	2392 KB	Output is correct
7	Incorrect	1 ms	2396 KB	Output isn't correct
8	Correct	1 ms	4452 KB	Output is correct
9	Correct	1 ms	4444 KB	Output is correct
10	Correct	1 ms	4644 KB	Output is correct
11	Correct	1 ms	4440 KB	Output is correct
12	Correct	1 ms	4444 KB	Output is correct
13	Correct	1 ms	4444 KB	Output is correct
14	Correct	1 ms	4444 KB	Output is correct
15	Correct	1 ms	4444 KB	Output is correct
16	Correct	1 ms	4440 KB	Output is correct
17	Correct	1 ms	6748 KB	Output is correct
18	Correct	1 ms	6744 KB	Output is correct
19	Correct	1 ms	6744 KB	Output is correct
20	Correct	1 ms	6748 KB	Output is correct
21	Correct	1 ms	6684 KB	Output is correct
22	Correct	1 ms	6748 KB	Output is correct
23	Correct	1 ms	6720 KB	Output is correct
24	Correct	1 ms	6748 KB	Output is correct
25	Correct	2 ms	6748 KB	Output is correct
26	Incorrect	1 ms	6744 KB	Output isn't correct
27	Incorrect	2 ms	10844 KB	Output isn't correct
28	Correct	3 ms	10844 KB	Output is correct
29	Correct	4 ms	10908 KB	Output is correct
30	Correct	4 ms	13148 KB	Output is correct
31	Correct	3 ms	11160 KB	Output is correct
32	Correct	3 ms	11100 KB	Output is correct
33	Correct	4 ms	15196 KB	Output is correct
34	Correct	3 ms	10844 KB	Output is correct
35	Correct	4 ms	15196 KB	Output is correct
36	Incorrect	4 ms	15196 KB	Output isn't correct
37	Correct	1 ms	4444 KB	Output is correct
38	Correct	167 ms	59924 KB	Output is correct
39	Correct	1 ms	4444 KB	Output is correct
40	Correct	15 ms	24500 KB	Output is correct
41	Correct	1 ms	4444 KB	Output is correct
42	Correct	2 ms	6748 KB	Output is correct
43	Correct	162 ms	59728 KB	Output is correct
44	Correct	4 ms	15196 KB	Output is correct
45	Correct	153 ms	59732 KB	Output is correct
46	Correct	180 ms	59676 KB	Output is correct
47	Correct	152 ms	59808 KB	Output is correct
48	Correct	138 ms	59924 KB	Output is correct
49	Incorrect	149 ms	59900 KB	Output isn't correct
50	Correct	149 ms	59844 KB	Output is correct
51	Correct	151 ms	59884 KB	Output is correct
52	Correct	159 ms	59928 KB	Output is correct
53	Correct	174 ms	59928 KB	Output is correct
54	Correct	159 ms	59928 KB	Output is correct
55	Correct	154 ms	59872 KB	Output is correct
56	Correct	170 ms	59728 KB	Output is correct
57	Correct	147 ms	59792 KB	Output is correct
58	Correct	152 ms	59928 KB	Output is correct
59	Correct	161 ms	59676 KB	Output is correct
60	Incorrect	152 ms	59928 KB	Output isn't correct
61	Incorrect	155 ms	60056 KB	Output isn't correct
62	Incorrect	148 ms	59928 KB	Output isn't correct
63	Incorrect	155 ms	59936 KB	Output isn't correct
64	Incorrect	131 ms	59932 KB	Output isn't correct
65	Correct	131 ms	59732 KB	Output is correct
66	Correct	181 ms	59932 KB	Output is correct
67	Correct	157 ms	59812 KB	Output is correct
68	Correct	143 ms	59984 KB	Output is correct
69	Correct	144 ms	59924 KB	Output is correct
70	Correct	90 ms	50700 KB	Output is correct
71	Correct	167 ms	59924 KB	Output is correct
72	Correct	179 ms	59768 KB	Output is correct
73	Correct	173 ms	59924 KB	Output is correct
74	Correct	171 ms	59928 KB	Output is correct
75	Correct	145 ms	59924 KB	Output is correct
76	Correct	165 ms	59924 KB	Output is correct
77	Correct	150 ms	59728 KB	Output is correct
78	Correct	144 ms	59852 KB	Output is correct
79	Correct	131 ms	59732 KB	Output is correct
80	Correct	167 ms	59768 KB	Output is correct
81	Correct	145 ms	59800 KB	Output is correct
82	Correct	181 ms	59728 KB	Output is correct
83	Correct	160 ms	59716 KB	Output is correct
84	Correct	151 ms	59736 KB	Output is correct
85	Correct	166 ms	59848 KB	Output is correct
86	Correct	164 ms	59808 KB	Output is correct
87	Correct	149 ms	59932 KB	Output is correct
88	Correct	182 ms	59888 KB	Output is correct
89	Correct	168 ms	59928 KB	Output is correct
90	Correct	87 ms	50732 KB	Output is correct
91	Correct	164 ms	59848 KB	Output is correct
92	Correct	170 ms	59752 KB	Output is correct
93	Correct	159 ms	59472 KB	Output is correct
94	Correct	175 ms	59668 KB	Output is correct
95	Correct	191 ms	59664 KB	Output is correct
96	Correct	162 ms	59464 KB	Output is correct
97	Correct	169 ms	59472 KB	Output is correct
98	Correct	172 ms	59668 KB	Output is correct
99	Correct	144 ms	59472 KB	Output is correct
100	Correct	147 ms	59676 KB	Output is correct