Add fix for problem 1768

src/main/java/com/fishercoder/solutions/_1768.java

@@ -19,4 +19,22 @@ public String mergeAlternately(String word1, String word2) {
             return sb.toString();
         }
     }
+    public static class Solution2 {
+        public String mergeAlternately(String word1, String word2) {
+            int len1 = word1.length();
+            int len2 = word2.length();
+            StringBuilder sb = new StringBuilder();
+
+            int diffLen = Math.min(len1, len2);
+            int i = 0;
+            for(i = 0; i < diffLen; i++) {
+                sb.append(word1.charAt(i));
+                sb.append(word2.charAt(i));
+            }
+            if (i >= len1) sb.append(word2.substring(i));
+            else sb.append(word1.substring(i));
+
+            return sb.toString();
+        }
+    }
 }

src/test/java/com/fishercoder/_1768Test.java

@@ -0,0 +1,29 @@
+package com.fishercoder;
+
+import com.fishercoder.solutions._1768;
+import org.junit.Assert;
+import org.junit.BeforeClass;
+import org.junit.Test;
+
+
+public class _1768Test {
+    private static _1768.Solution2 solution2;
+    private static String word1;
+    private static String word2;
+    private static String expected;
+    private static String actual;
+
+    @BeforeClass
+    public static void setup() {
+        solution2 = new _1768.Solution2();
+    }
+
+    @Test
+    public void test1() {
+        word1 = "abc";
+        word2 = "pqr";
+        expected = "apbqcr";
+        actual = solution2.mergeAlternately(word1, word2);
+        Assert.assertEquals(actual, expected);
+    }
+}