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답안 #907289

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
907289 2024-01-15T10:54:49 Z daoquanglinh2007 Bomb (IZhO17_bomb) C++17
32 / 100
 1000 ms 59064 KB 
#include <bits/stdc++.h>
using namespace std;

const int NM = 2500;

int N, M, f[NM+5][NM+5], dp[NM+5][NM+5], ans = 0;
char a[NM+5][NM+5];

int getf(int x, int y, int u, int v){
	return f[u][v]-f[x-1][v]-f[u][y-1]+f[x-1][y-1];
}

bool check(int r, int c){
	for (int i = 1; i <= N; i++)
		for (int j = 1; j <= M; j++) dp[i][j] = 0;
	
	for (int i = 1; i+r-1 <= N; i++)
		for (int j = 1; j+c-1 <= M; j++)
			if (getf(i, j, i+r-1, j+c-1) == r*c){
				dp[i][j]++;
				dp[i+r][j]--;
				dp[i][j+c]--;
				dp[i+r][j+c]++;
			}
	for (int i = 1; i <= N; i++)
		for (int j = 1; j <= M; j++){
			dp[i][j] += dp[i-1][j]+dp[i][j-1]-dp[i-1][j-1];
			if (dp[i][j] == 0 && a[i][j] == '1') return 0;
		}
	return 1;
}

int main(){
//	freopen("BOMB.inp", "r", stdin);
//	freopen("BOMB.ans", "w", stdout);
	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];
			if (a[i][j] == '1') f[i][j] = 1;
		}
	for (int i = 1; i <= N; i++)
		for (int j = 1; j <= M; j++)
			f[i][j] += f[i][j-1]+f[i-1][j]-f[i-1][j-1];
			
	int j = M;
	for (int i = 1; i <= N; i++){
		while (j >= 0 && !check(i, j)){
			j--;
			if (i*j <= ans) break;
		}
		if (i*j <= ans) break;
		ans = i*j;
	}
	cout << ans;
	return 0;
}

Subtask #1
32.0 / 100.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 4440 KB Output is correct
2 Correct 1 ms 4444 KB Output is correct
3 Correct 10 ms 54480 KB Output is correct
4 Correct 10 ms 54620 KB Output is correct
5 Correct 5 ms 4444 KB Output is correct
6 Correct 2 ms 4444 KB Output is correct
7 Correct 1 ms 4440 KB Output is correct
8 Correct 1 ms 4696 KB Output is correct
9 Correct 1 ms 4444 KB Output is correct
10 Correct 1 ms 4444 KB Output is correct
11 Correct 1 ms 4444 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 4440 KB Output is correct
15 Correct 1 ms 4440 KB Output is correct
16 Correct 2 ms 6744 KB Output is correct
17 Correct 2 ms 8660 KB Output is correct
18 Correct 2 ms 8792 KB Output is correct
19 Correct 3 ms 10844 KB Output is correct
20 Correct 3 ms 10844 KB Output is correct
21 Correct 2 ms 6748 KB Output is correct
22 Correct 3 ms 10844 KB Output is correct
23 Correct 3 ms 10840 KB Output is correct
24 Incorrect 2 ms 10904 KB Output isn't correct
25 Incorrect 3 ms 10844 KB Output isn't correct
26 Correct 4 ms 10840 KB Output is correct
27 Correct 21 ms 14940 KB Output is correct
28 Correct 31 ms 14936 KB Output is correct
29 Incorrect 42 ms 14936 KB Output isn't correct
30 Incorrect 58 ms 15164 KB Output isn't correct
31 Incorrect 47 ms 14940 KB Output isn't correct
32 Incorrect 47 ms 14936 KB Output isn't correct
33 Correct 72 ms 17244 KB Output is correct
34 Correct 21 ms 13400 KB Output is correct
35 Incorrect 49 ms 17244 KB Output isn't correct
36 Correct 147 ms 19288 KB Output is correct
37 Correct 2 ms 6492 KB Output is correct
38 Execution timed out 1056 ms 58916 KB Time limit exceeded
39 Correct 1 ms 6488 KB Output is correct
40 Correct 678 ms 28048 KB Output is correct
41 Incorrect 2 ms 6492 KB Output isn't correct
42 Incorrect 3 ms 10844 KB Output isn't correct
43 Execution timed out 1086 ms 58964 KB Time limit exceeded
44 Incorrect 71 ms 19288 KB Output isn't correct
45 Execution timed out 1054 ms 58964 KB Time limit exceeded
46 Execution timed out 1024 ms 58756 KB Time limit exceeded
47 Execution timed out 1096 ms 58960 KB Time limit exceeded
48 Execution timed out 1063 ms 58964 KB Time limit exceeded
49 Execution timed out 1024 ms 58960 KB Time limit exceeded
50 Execution timed out 1101 ms 58956 KB Time limit exceeded
51 Execution timed out 1043 ms 58768 KB Time limit exceeded
52 Execution timed out 1020 ms 58768 KB Time limit exceeded
53 Execution timed out 1049 ms 58764 KB Time limit exceeded
54 Execution timed out 1020 ms 58960 KB Time limit exceeded
55 Execution timed out 1016 ms 58772 KB Time limit exceeded
56 Execution timed out 1006 ms 58960 KB Time limit exceeded
57 Execution timed out 1055 ms 58788 KB Time limit exceeded
58 Execution timed out 1047 ms 58996 KB Time limit exceeded
59 Execution timed out 1054 ms 58964 KB Time limit exceeded
60 Execution timed out 1030 ms 58960 KB Time limit exceeded
61 Execution timed out 1012 ms 58756 KB Time limit exceeded
62 Execution timed out 1039 ms 58936 KB Time limit exceeded
63 Execution timed out 1051 ms 58964 KB Time limit exceeded
64 Execution timed out 1010 ms 58964 KB Time limit exceeded
65 Execution timed out 1072 ms 58772 KB Time limit exceeded
66 Execution timed out 1076 ms 58756 KB Time limit exceeded
67 Execution timed out 1010 ms 58788 KB Time limit exceeded
68 Execution timed out 1086 ms 58784 KB Time limit exceeded
69 Execution timed out 1071 ms 59008 KB Time limit exceeded
70 Execution timed out 1064 ms 52116 KB Time limit exceeded
71 Execution timed out 1046 ms 58888 KB Time limit exceeded
72 Execution timed out 1059 ms 58780 KB Time limit exceeded
73 Execution timed out 1039 ms 58760 KB Time limit exceeded
74 Execution timed out 1076 ms 58788 KB Time limit exceeded
75 Execution timed out 1058 ms 58864 KB Time limit exceeded
76 Execution timed out 1014 ms 58772 KB Time limit exceeded
77 Execution timed out 1064 ms 58880 KB Time limit exceeded
78 Execution timed out 1046 ms 58964 KB Time limit exceeded
79 Execution timed out 1072 ms 58740 KB Time limit exceeded
80 Execution timed out 1038 ms 58768 KB Time limit exceeded
81 Execution timed out 1018 ms 58784 KB Time limit exceeded
82 Execution timed out 1099 ms 58896 KB Time limit exceeded
83 Execution timed out 1018 ms 58764 KB Time limit exceeded
84 Execution timed out 1025 ms 58860 KB Time limit exceeded
85 Execution timed out 1051 ms 58868 KB Time limit exceeded
86 Execution timed out 1031 ms 58960 KB Time limit exceeded
87 Execution timed out 1097 ms 58756 KB Time limit exceeded
88 Execution timed out 1054 ms 58880 KB Time limit exceeded
89 Execution timed out 1057 ms 58940 KB Time limit exceeded
90 Execution timed out 1058 ms 52052 KB Time limit exceeded
91 Execution timed out 1059 ms 58780 KB Time limit exceeded
92 Execution timed out 1056 ms 58964 KB Time limit exceeded
93 Execution timed out 1050 ms 59064 KB Time limit exceeded
94 Execution timed out 1034 ms 58960 KB Time limit exceeded
95 Execution timed out 1052 ms 58800 KB Time limit exceeded
96 Execution timed out 1040 ms 58768 KB Time limit exceeded
97 Execution timed out 1024 ms 58960 KB Time limit exceeded
98 Execution timed out 1101 ms 58868 KB Time limit exceeded
99 Execution timed out 1043 ms 58936 KB Time limit exceeded
100 Execution timed out 1008 ms 58960 KB Time limit exceeded