update readme

Author: hogan-tech

.github/test.txt

@@ -1 +1,3 @@
-0944-delete-columns-to-make-sorted python easy
+3779-minimum-number-of-operations-to-have-distinct-elements python medium
+3780-maximum-sum-of-three-numbers-divisible-by-three python medium
+3781-maximum-score-after-binary-swaps python medium

…-operations-to-have-distinct-elements.py …-operations-to-have-distinct-elements.py3779-minimum-number-of-operations-to-have-distinct-elements/3779-minimum-number-of-operations-to-have-distinct-elements.py renamed to Python/3779-minimum-number-of-operations-to-have-distinct-elements.py 3779-minimum-number-of-operations-to-have-distinct-elements/3779-minimum-number-of-operations-to-have-distinct-elements.py renamed to Python/3779-minimum-number-of-operations-to-have-distinct-elements.py

@@ -319,3 +319,6 @@
 | 3774 | [Absolute Difference Between Maximum and Minimum K Elements](https://leetcode.com/problems/absolute-difference-between-maximum-and-minimum-k-elements)                 | [Python](./Python/3774-absolute-difference-between-maximum-and-minimum-k-elements.py)         | [Easy](./Readme/3774-absolute-difference-between-maximum-and-minimum-k-elements.md)           |
 | 3775 | [Reverse Words With Same Vowel Count](https://leetcode.com/problems/reverse-words-with-same-vowel-count)                                                               | [Python](./Python/3775-reverse-words-with-same-vowel-count.py)                                | [Medium](./Readme/3775-reverse-words-with-same-vowel-count.md)                                |
 | 3776 | [Minimum Moves to Balance Circular Array](https://leetcode.com/problems/minimum-moves-to-balance-circular-array)                                                       | [Python](./Python/3776-minimum-moves-to-balance-circular-array.py)                            | [Medium](./Readme/3776-minimum-moves-to-balance-circular-array.md)                            |
+| 3779 | [Minimum Number of Operations to Have Distinct Elements](https://leetcode.com/problems/minimum-number-of-operations-to-have-distinct-elements)                         | [Python](./Python/3779-minimum-number-of-operations-to-have-distinct-elements.py)             | [Medium](./Readme/3779-minimum-number-of-operations-to-have-distinct-elements.md)             |
+| 3780 | [Maximum Sum of Three Numbers Divisible by Three](https://leetcode.com/problems/maximum-sum-of-three-numbers-divisible-by-three)                                       | [Python](./Python/3780-maximum-sum-of-three-numbers-divisible-by-three.py)                    | [Medium](./Readme/3780-maximum-sum-of-three-numbers-divisible-by-three.md)                    |
+| 3781 | [Maximum Score After Binary Swaps](https://leetcode.com/problems/maximum-score-after-binary-swaps)                                                                     | [Python](./Python/3781-maximum-score-after-binary-swaps.py)                                   | [Medium](./Readme/3781-maximum-score-after-binary-swaps.md)                                   |