2022-06-29 update: added "Determine Whether Matrix Can Be Obtained By Rotation"

Author: fartem

src/main/java/com/smlnskgmail/jaman/leetcodejava/easy/DetermineWhetherMatrixCanBeObtainedByRotation.java

@@ -0,0 +1,40 @@
+package com.smlnskgmail.jaman.leetcodejava.easy;
+
+// https://leetcode.com/problems/determine-whether-matrix-can-be-obtained-by-rotation/
+public class DetermineWhetherMatrixCanBeObtainedByRotation {
+
+    private final int[][] mat;
+    private final int[][] target;
+
+    public DetermineWhetherMatrixCanBeObtainedByRotation(int[][] mat, int[][] target) {
+        this.mat = mat;
+        this.target = target;
+    }
+
+    public boolean solution() {
+        int length = mat.length;
+        boolean fC = true;
+        boolean sC = true;
+        boolean tC = true;
+        boolean lC = true;
+        for (int i = 0; i < length; i++) {
+            for (int j = 0; j < length; j++) {
+                int curr = mat[i][j];
+                if (fC && curr != target[i][j]) {
+                    fC = false;
+                }
+                if (sC && curr != target[j][length - i - 1]) {
+                    sC = false;
+                }
+                if (tC && curr != target[length - i - 1][length - j - 1]) {
+                    tC = false;
+                }
+                if (lC && curr != target[length - j - 1][i]) {
+                    lC = false;
+                }
+            }
+        }
+        return fC || sC || tC || lC;
+    }
+
+}

src/test/java/com/smlnskgmail/jaman/leetcodejava/easy/DetermineWhetherMatrixCanBeObtainedByRotationTest.java

@@ -0,0 +1,19 @@
+package com.smlnskgmail.jaman.leetcodejava.easy;
+
+import org.junit.Test;
+
+import static org.junit.Assert.assertTrue;
+
+public class DetermineWhetherMatrixCanBeObtainedByRotationTest {
+
+    @Test
+    public void defaultTest() {
+        assertTrue(
+                new DetermineWhetherMatrixCanBeObtainedByRotation(
+                        new int[][]{{0, 1}, {1, 0}},
+                        new int[][]{{1, 0}, {0, 1}}
+                ).solution()
+        );
+    }
+
+}