You are given the heads of two sorted linked lists list1 and list2.
Merge the two lists in a one sorted list. The list should be made by splicing together the nodes of the first two lists.
\n\nReturn the head of the merged linked list.
\n\n\n
Example 1:
\n![\"\"](\"https://assets.leetcode.com/uploads/2020/10/03/merge_ex1.jpg\")
\n\nInput: list1 = [1,2,4], list2 = [1,3,4]\nOutput: [1,1,2,3,4,4]\n\n\n
Example 2:
\n\n\nInput: list1 = [], list2 = []\nOutput: []\n\n\n
Example 3:
\n\n\nInput: list1 = [], list2 = [0]\nOutput: [0]\n\n\n
\n
Constraints:
\n\n[0, 50].-100 <= Node.val <= 100list1 and list2 are sorted in non-decreasing order.Compiled with clang 11 using the latest C++ 17 standard.
Your code is compiled with level two optimization (-O2). AddressSanitizer is also enabled to help detect out-of-bounds and use-after-free bugs.
Most standard library headers are already included automatically for your convenience.
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Python 2.7.12.
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\\r\\n\\r\\nFor Map/TreeMap data structure, you may use sortedcontainers library.
\\r\\n\\r\\nNote that Python 2.7 will not be maintained past 2020. For the latest Python, please choose Python3 instead.
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\\r\\n\\r\\n1. Adding an item to a hash.\\r\\n
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