Pairwise Swap Elements of a Linked List Problem

Pairwise Swap Elements of a Linked List Problem — ExecCode Easy DSA Practice

Solve the Pairwise Swap Elements of a Linked List problem on ExecCode. Free online easy DSA practice in Linked List. Write and run code in Java, C++, Python — no signup required to run.

Problem description

Description You are given the input needed to solve Pairwise Swap Elements of a Linked List. Your task is to compute the required answer and return swapped list JSON. A number or sequence is stored node by node. In Pairwise Swap Elements of a Linked List, each step must preserve the order of nodes while solving the required operation. JSON nums array.

Examples

Input {"nums": [1, 2, 3, 4]}; Output [2, 1, 4, 3]

Constraints

Even length typical

Practice Pairwise Swap Elements of a Linked List free on ExecCode. Browse DSA problems, topic map, and placement guides.