Time: 142 ms (91.3%), Space: 62.5 MB (45.22%) - LeetHub

Author: chappdev2019

1765-merge-in-between-linked-lists/1765-merge-in-between-linked-lists.js

@@ -0,0 +1,24 @@
+var mergeInBetween = function (list1, a, b, list2) {
+    let end = list1;
+    
+    for (let i = 0; i < b; i++) {
+        end = end.next;
+    }
+    let endNext = end.next; 
+
+    let startPrev = list1;
+    for (let i = 0; i < a - 1; i++) {
+        startPrev = startPrev.next;
+    }
+
+    startPrev.next = list2;
+
+    let cur = list2;
+    while (cur.next) {
+        cur = cur.next;
+    }
+
+    cur.next = endNext;
+
+    return list1;
+};