add 3226

Author: fishercoder1534

Diff for: paginated_contents/algorithms/4th_thousand/README.md

@@ -1,5 +1,6 @@
 | #    | Title                                                                                                                                                               | Solutions                                                                                                                         | Video                                                                         | Difficulty | Tag                                                                  
 |------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------|-------------------------------------------------------------------------------|------------|----------------------------------------------------------------------
+| 3226 | [Number of Bit Changes to Make Two Integers Equal](https://leetcode.com/problems/number-of-bit-changes-to-make-two-integers-equal/)                                                                 | [Java](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/fourththousand/_3226.java) |                                                                               | Easy       |
 | 3224 | [Minimum Array Changes to Make Differences Equal](https://leetcode.com/problems/minimum-array-changes-to-make-differences-equal/)                                                                 | [Java](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/fourththousand/_3224.java) |                                                                               | Medium     |
 | 3223 | [Minimum Length of String After Operations](https://leetcode.com/problems/minimum-length-of-string-after-operations/)                                                                 | [Java](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/fourththousand/_3223.java) |                                                                               | Medium     |
 | 3222 | [Find the Winning Player in Coin Game](https://leetcode.com/problems/find-the-winning-player-in-coin-game/)                                                                 | [Java](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/fourththousand/_3222.java) |                                                                               | Easy       | 

Diff for: src/main/java/com/fishercoder/solutions/fourththousand/_3226.java

@@ -0,0 +1,35 @@
+package com.fishercoder.solutions.fourththousand;
+
+public class _3226 {
+    public static class Solution1 {
+        public int minChanges(int n, int k) {
+            if (n == k) {
+                return 0;
+            }
+            String nBin = Integer.toBinaryString(n);
+            String kBin = Integer.toBinaryString(k);
+            if (nBin.length() > kBin.length()) {
+                StringBuilder sb = new StringBuilder(kBin);
+                sb.reverse();
+                while (nBin.length() > sb.length()) {
+                    sb.append("0");
+                }
+                kBin = sb.reverse().toString();
+            }
+            if (nBin.length() != kBin.length()) {
+                return -1;
+            }
+            int minChanges = 0;
+            for (int i = nBin.length() - 1; i >= 0; i--) {
+                if (nBin.charAt(i) != kBin.charAt(i)) {
+                    if (nBin.charAt(i) == '1') {
+                        minChanges++;
+                    } else {
+                        return -1;
+                    }
+                }
+            }
+            return minChanges;
+        }
+    }
+}

Diff for: src/test/java/com/fishercoder/fourththousand/_3226Test.java

@@ -0,0 +1,31 @@
+package com.fishercoder.fourththousand;
+
+import com.fishercoder.solutions.fourththousand._3226;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+public class _3226Test {
+    private static _3226.Solution1 solution1;
+
+    @BeforeEach
+    public void setup() {
+        solution1 = new _3226.Solution1();
+    }
+
+    @Test
+    public void test1() {
+        assertEquals(2, solution1.minChanges(13, 4));
+    }
+
+    @Test
+    public void test2() {
+        assertEquals(-1, solution1.minChanges(44, 2));
+    }
+
+    @Test
+    public void test3() {
+        assertEquals(-1, solution1.minChanges(2, 47));
+    }
+}