Update README.md

Author: kamyu104

README.md

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 ![Language](https://img.shields.io/badge/language-Python%20%2F%20Modern%20C++-orange.svg) 
 [![License](https://img.shields.io/badge/license-MIT-blue.svg)](./LICENSE.md) 
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 1968 | [Array With Elements Not Equal to Average of Neighbors](https://leetcode.com/problems/array-with-elements-not-equal-to-average-of-neighbors/) | [C++](./C++/array-with-elements-not-equal-to-average-of-neighbors.cpp) [Python](./Python/array-with-elements-not-equal-to-average-of-neighbors.py) | _O(n)_  on average | _O(1)_        | Medium         | variant of [Wiggle Sort II](https://leetcode.com/problems/wiggle-sort-ii/) | Quick Select, Tri Partition |
 1985 | [Find the Kth Largest Integer in the Array](https://leetcode.com/problems/find-the-kth-largest-integer-in-the-array/) | [C++](./C++/find-the-kth-largest-integer-in-the-array.cpp) [Python](./Python/find-the-kth-largest-integer-in-the-array.py) | _O(n)_ on average| _O(n)_ | Medium | | Quick Select |
 1996 | [The Number of Weak Characters in the Game](https://leetcode.com/problems/the-number-of-weak-characters-in-the-game/) | [C++](./C++/the-number-of-weak-characters-in-the-game.cpp) [Python](./Python/the-number-of-weak-characters-in-the-game.py) | _O(nlogn)_ | _O(1)_ | Medium | | |
+2015 | [Average Height of Buildings in Each Segment](https://leetcode.com/problems/average-height-of-buildings-in-each-segment/) | [C++](./C++/average-height-of-buildings-in-each-segment.cpp) [Python](./Python/average-height-of-buildings-in-each-segment.py) | _O(nlogn)_   | _O(n)_        | Medium         | 🔒 | Line Sweep
 
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