From 8e196a299a22a0694079b94d09fb97d831a8c608 Mon Sep 17 00:00:00 2001
From: Matej Focko <me@mfocko.xyz>
Date: Fri, 22 Nov 2024 17:49:39 +0100
Subject: [PATCH] =?UTF-8?q?kt:=20add=20=C2=AB1072.=20Flip=20Columns=20For?=
 =?UTF-8?q?=20Maximum=20Number=20of=20Equal=20Rows=C2=BB?=
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URL:	https://leetcode.com/problems/flip-columns-for-maximum-number-of-equal-rows/
Signed-off-by: Matej Focko <me@mfocko.xyz>
---
 ...columns-for-maximum-number-of-equal-rows.kt | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)
 create mode 100644 kt/flip-columns-for-maximum-number-of-equal-rows.kt

diff --git a/kt/flip-columns-for-maximum-number-of-equal-rows.kt b/kt/flip-columns-for-maximum-number-of-equal-rows.kt
new file mode 100644
index 0000000..3cf5df5
--- /dev/null
+++ b/kt/flip-columns-for-maximum-number-of-equal-rows.kt
@@ -0,0 +1,18 @@
+class Solution {
+    fun maxEqualRowsAfterFlips(matrix: Array<IntArray>): Int {
+        val freqs = mutableMapOf<String, Int>()
+
+        matrix
+            .map { row ->
+                row.map { it == row[0] }.joinToString(separator = "")
+            }
+            .forEach { pattern ->
+                freqs.put(
+                    pattern,
+                    1 + freqs.getOrDefault(pattern, 0),
+                )
+            }
+
+        return freqs.values.max()
+    }
+}