Create 1768-merge-strings-alternately.kt

Author: a93a

Diff for: kotlin/1768-merge-strings-alternately.kt

@@ -0,0 +1,19 @@
+class Solution {
+    fun mergeAlternately(word1: String, word2: String): String {
+        val m = word1.length
+        val n = word2.length
+        var i = 0
+        var j = 0
+
+        val res = StringBuilder()
+        while (i < m && j < n) {
+            res.append(word1[i++])
+            res.append(word2[j++])
+        }
+
+        res.append(word1.drop(i))
+        res.append(word2.drop(j))
+
+        return res.toString()
+    }
+}