leetcode

commit 336710072102d54d076b0b520d4268bff37dc708
parent 0778f15ed04bd09dc551a19993bde58d81d37a34
Author: Dimitrije Dobrota <mail@dimitrijedobrota.com>
Date:   Sat, 13 Apr 2024 21:21:21 +0200

Daily Problem

Diffstat:
A
Problems/0085.cpp
 | 
26
++++++++++++++++++++++++++
M
README.md
 | 
1
+

2 files changed, 27 insertions(+), 0 deletions(-)
diff --git a/Problems/0085.cpp b/Problems/0085.cpp
@@ -0,0 +1,26 @@
+class Solution {
+  public:
+    int maximalRectangle(const vector<vector<char>> &matrix) const {
+        const int n = size(matrix), m = size(matrix[0]);
+        static int dp[202][202] = {0};
+        int res = 0;
+
+        for (int i = n - 1; i >= 0; i--) {
+            dp[i][m] = 0;
+            for (int j = m - 1, acc = 0; j >= 0; j--) {
+                dp[i][j] = matrix[i][j] == '1' ? dp[i][j + 1] + 1 : 0;
+            }
+        }
+
+        for (int i = 0; i < n; i++) {
+            for (int j = 0; j < m; j++) {
+                for (int l = i, len = m; l < n && matrix[l][j] == '1'; l++) {
+                    len = min(len, dp[l][j]);
+                    res = max(res, (l - i + 1) * len);
+                }
+            }
+        }
+
+        return res;
+    }
+};
diff --git a/README.md b/README.md
@@ -107,6 +107,7 @@ for solving problems.
 |  0082  |   Medium   | [Remove Duplicates from Sorted List II](Problems/0082.cpp)                                         |
 |  0083  |    Easy    | [Remove Duplicates from Sorted List](Problems/0083.cpp)                                            |
 |  0084  |    Hard    | [Largest Rectangle in Histogram](Problems/0084.cpp)                                                |
+|  0085  |    Hard    | [Maximal Rectangle](Problems/0085.cpp)                                                             |
 |  0086  |   Medium   | [Partition List](Problems/0086.cpp)                                                                |
 |  0087  |    Hard    | [Scramble String](Problems/0087.cpp)                                                               |
 |  0088  |    Easy    | [Merge Sorted Array](Problems/0088.cpp)                                                            |