Create Solution.java

Author: Jerring

solution/1072.Flip Columns For Maximum Number of Equal Rows/Solution.java

@@ -0,0 +1,19 @@
+class Solution {
+    public int maxEqualRowsAfterFlips(int[][] matrix) {
+        Map<String, Integer> map = new HashMap<>();
+        for (int[] row : matrix) {
+            if (row[0] == 1) {
+                for (int i = 0; i < row.length; ++i) {
+                    row[i] ^= 1;
+                }
+            }
+            StringBuilder sb = new StringBuilder();
+            for (int x : row) {
+                sb.append(x);
+            }
+            String s = sb.toString();
+            map.put(s, map.getOrDefault(s, 0) + 1);
+        }
+        return map.values().stream().max(Integer::compareTo).get();
+    }
+}