#include<bits/stdc++.h>
using namespace std;
const int maxN = 2600;
int n, m;
int a[maxN][maxN];
int d[maxN][maxN];
int c[maxN][maxN];
string s;
int heuristic() {
int minW = n;
int minH = m;
for (int i = 1; i<=n; i++) {
int cur = 0;
for (int j = 1; j<=m; j++) {
if (a[i][j] == 1) cur++; else {
if (cur > 0) {
minH = min(minH, cur);
cur = 0;
}
}
}
if (cur > 0) minH = min(minH, cur);
}
for (int j = 1; j<=m; j++) {
int cur = 0;
for (int i = 1; i<=n; i++) {
if (a[i][j] == 1) cur++; else {
if (cur > 0) {
minW = min(minW, cur);
cur = 0;
}
}
}
if (cur > 0) minW = min(minW, cur);
}
return minW * minH;
}
int getDSum(int x1, int y1, int x2, int y2) {
if (x2 > n || y2 > m) return 0;
return d[x2][y2] + d[x1 - 1][y1 - 1] - d[x1 - 1][y2] - d[x2][y1 - 1];
}
int getCSum(int x1, int y1, int x2, int y2) {
x1 = max(x1, 1);
y1 = max(y1, 1);
return c[x2][y2] + c[x1 - 1][y1 - 1] - c[x1 - 1][y2] - c[x2][y1 - 1];
}
bool check(int x, int y) {
for (int i = 1; i<=n; i++) {
for (int j = 1; j<=m; j++) {
c[i][j] = 0;
}
}
for (int i = 1; i<=n; i++) {
for (int j = 1; j<=m; j++) {
if (getDSum(i, j, i + x - 1, j + y - 1) == x * y) c[i][j] = 1;
}
}
for (int i = 1; i <= n; i++) {
for (int j = 1; j<=m; j++) {
c[i][j] += c[i - 1][j] + c[i][j - 1] - c[i - 1][j - 1];
}
}
for (int i = 1; i<=n; i++) {
for (int j = 1; j <= m; j++) {
if (a[i][j] && getCSum(i - x + 1, j - y + 1, i, j) == 0) return false;
}
}
return true;
}
int main() {
cin >> n >> m;
for (int i = 1; i <=n; i++) {
cin >> s;
for (int j = 0; j < m; j++) {
a[i][j + 1] = s[j] - '0';
}
}
if (n >= 500 || m >= 500) {
cout << heuristic() << endl;
return 0;
}
for (int i = 1; i <= n; i++) {
for (int j = 1; j<=m; j++) {
d[i][j] = d[i - 1][j] + d[i][j - 1] + a[i][j] - d[i - 1][j - 1];
}
}
int ans = 0;
int width = m;
for (int i = 1; i <=n; i++) {
while (!check(i, width) && width > 0) width--;
ans = max(ans, i * width);
}
cout << ans << endl;
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
244 KB |
Output is correct |
| 2 |
Correct |
1 ms |
468 KB |
Output is correct |
| 3 |
Correct |
5 ms |
10296 KB |
Output is correct |
| 4 |
Correct |
5 ms |
10324 KB |
Output is correct |
| 5 |
Correct |
1 ms |
304 KB |
Output is correct |
| 6 |
Correct |
1 ms |
308 KB |
Output is correct |
| 7 |
Correct |
1 ms |
304 KB |
Output is correct |
| 8 |
Correct |
1 ms |
468 KB |
Output is correct |
| 9 |
Correct |
1 ms |
560 KB |
Output is correct |
| 10 |
Correct |
1 ms |
468 KB |
Output is correct |
| 11 |
Correct |
1 ms |
468 KB |
Output is correct |
| 12 |
Correct |
1 ms |
468 KB |
Output is correct |
| 13 |
Correct |
1 ms |
468 KB |
Output is correct |
| 14 |
Correct |
1 ms |
432 KB |
Output is correct |
| 15 |
Correct |
1 ms |
436 KB |
Output is correct |
| 16 |
Correct |
1 ms |
468 KB |
Output is correct |
| 17 |
Correct |
5 ms |
1164 KB |
Output is correct |
| 18 |
Correct |
4 ms |
1108 KB |
Output is correct |
| 19 |
Correct |
8 ms |
1492 KB |
Output is correct |
| 20 |
Correct |
8 ms |
1492 KB |
Output is correct |
| 21 |
Correct |
6 ms |
1024 KB |
Output is correct |
| 22 |
Correct |
10 ms |
1208 KB |
Output is correct |
| 23 |
Correct |
12 ms |
1620 KB |
Output is correct |
| 24 |
Correct |
6 ms |
1364 KB |
Output is correct |
| 25 |
Correct |
13 ms |
1644 KB |
Output is correct |
| 26 |
Correct |
13 ms |
1644 KB |
Output is correct |
| 27 |
Correct |
256 ms |
4848 KB |
Output is correct |
| 28 |
Correct |
418 ms |
5176 KB |
Output is correct |
| 29 |
Correct |
528 ms |
6572 KB |
Output is correct |
| 30 |
Correct |
941 ms |
7868 KB |
Output is correct |
| 31 |
Correct |
693 ms |
6220 KB |
Output is correct |
| 32 |
Correct |
710 ms |
7244 KB |
Output is correct |
| 33 |
Execution timed out |
1086 ms |
8276 KB |
Time limit exceeded |
| 34 |
Correct |
281 ms |
5600 KB |
Output is correct |
| 35 |
Execution timed out |
1018 ms |
8280 KB |
Time limit exceeded |
| 36 |
Execution timed out |
1085 ms |
8260 KB |
Time limit exceeded |
| 37 |
Correct |
1 ms |
468 KB |
Output is correct |
| 38 |
Correct |
177 ms |
26668 KB |
Output is correct |
| 39 |
Correct |
1 ms |
468 KB |
Output is correct |
| 40 |
Incorrect |
19 ms |
7244 KB |
Output isn't correct |
| 41 |
Correct |
1 ms |
468 KB |
Output is correct |
| 42 |
Correct |
15 ms |
1620 KB |
Output is correct |
| 43 |
Correct |
180 ms |
26688 KB |
Output is correct |
| 44 |
Execution timed out |
1087 ms |
8276 KB |
Time limit exceeded |
| 45 |
Incorrect |
191 ms |
26772 KB |
Output isn't correct |
| 46 |
Correct |
181 ms |
26716 KB |
Output is correct |
| 47 |
Incorrect |
187 ms |
26816 KB |
Output isn't correct |
| 48 |
Incorrect |
178 ms |
26680 KB |
Output isn't correct |
| 49 |
Correct |
186 ms |
26776 KB |
Output is correct |
| 50 |
Incorrect |
181 ms |
26728 KB |
Output isn't correct |
| 51 |
Incorrect |
190 ms |
26760 KB |
Output isn't correct |
| 52 |
Incorrect |
186 ms |
26652 KB |
Output isn't correct |
| 53 |
Incorrect |
176 ms |
26792 KB |
Output isn't correct |
| 54 |
Incorrect |
182 ms |
26688 KB |
Output isn't correct |
| 55 |
Incorrect |
177 ms |
26632 KB |
Output isn't correct |
| 56 |
Correct |
181 ms |
26416 KB |
Output is correct |
| 57 |
Incorrect |
179 ms |
26448 KB |
Output isn't correct |
| 58 |
Incorrect |
176 ms |
26532 KB |
Output isn't correct |
| 59 |
Incorrect |
185 ms |
26544 KB |
Output isn't correct |
| 60 |
Correct |
174 ms |
26432 KB |
Output is correct |
| 61 |
Correct |
175 ms |
26400 KB |
Output is correct |
| 62 |
Correct |
180 ms |
26348 KB |
Output is correct |
| 63 |
Correct |
170 ms |
26220 KB |
Output is correct |
| 64 |
Correct |
172 ms |
26188 KB |
Output is correct |
| 65 |
Incorrect |
175 ms |
26316 KB |
Output isn't correct |
| 66 |
Incorrect |
173 ms |
26260 KB |
Output isn't correct |
| 67 |
Incorrect |
174 ms |
26264 KB |
Output isn't correct |
| 68 |
Incorrect |
179 ms |
26288 KB |
Output isn't correct |
| 69 |
Incorrect |
171 ms |
26188 KB |
Output isn't correct |
| 70 |
Incorrect |
112 ms |
20848 KB |
Output isn't correct |
| 71 |
Incorrect |
179 ms |
26292 KB |
Output isn't correct |
| 72 |
Incorrect |
173 ms |
26152 KB |
Output isn't correct |
| 73 |
Incorrect |
177 ms |
26252 KB |
Output isn't correct |
| 74 |
Incorrect |
174 ms |
26188 KB |
Output isn't correct |
| 75 |
Incorrect |
176 ms |
26376 KB |
Output isn't correct |
| 76 |
Incorrect |
175 ms |
26228 KB |
Output isn't correct |
| 77 |
Incorrect |
186 ms |
26236 KB |
Output isn't correct |
| 78 |
Incorrect |
178 ms |
26136 KB |
Output isn't correct |
| 79 |
Incorrect |
174 ms |
26124 KB |
Output isn't correct |
| 80 |
Incorrect |
177 ms |
25940 KB |
Output isn't correct |
| 81 |
Incorrect |
178 ms |
26000 KB |
Output isn't correct |
| 82 |
Incorrect |
174 ms |
25988 KB |
Output isn't correct |
| 83 |
Incorrect |
176 ms |
25932 KB |
Output isn't correct |
| 84 |
Incorrect |
184 ms |
25956 KB |
Output isn't correct |
| 85 |
Incorrect |
171 ms |
25996 KB |
Output isn't correct |
| 86 |
Incorrect |
172 ms |
26000 KB |
Output isn't correct |
| 87 |
Incorrect |
173 ms |
26036 KB |
Output isn't correct |
| 88 |
Incorrect |
177 ms |
25960 KB |
Output isn't correct |
| 89 |
Incorrect |
173 ms |
25932 KB |
Output isn't correct |
| 90 |
Incorrect |
116 ms |
20852 KB |
Output isn't correct |
| 91 |
Incorrect |
173 ms |
25836 KB |
Output isn't correct |
| 92 |
Incorrect |
172 ms |
25744 KB |
Output isn't correct |
| 93 |
Incorrect |
176 ms |
25672 KB |
Output isn't correct |
| 94 |
Incorrect |
177 ms |
25696 KB |
Output isn't correct |
| 95 |
Incorrect |
175 ms |
25732 KB |
Output isn't correct |
| 96 |
Incorrect |
174 ms |
25736 KB |
Output isn't correct |
| 97 |
Incorrect |
175 ms |
25636 KB |
Output isn't correct |
| 98 |
Incorrect |
178 ms |
25664 KB |
Output isn't correct |
| 99 |
Incorrect |
173 ms |
25720 KB |
Output isn't correct |
| 100 |
Incorrect |
176 ms |
25736 KB |
Output isn't correct |
