flip game is premium content

Author: anishLearnsToCode

README.md

@@ -88,7 +88,7 @@
 | 283 | [Move Zeroes](https://leetcode.com/problems/move-zeroes) | Easy | [![Java](https://img.icons8.com/color/40/000000/java-coffee-cup-logo.png)](src/MoveZeros.java) [![Python](https://img.icons8.com/color/35/000000/python.png)](python/move_zeroes.py) |
 | 290 | [Word Pattern](https://leetcode.com/problems/word-pattern) | Easy | [![Java](https://img.icons8.com/color/40/000000/java-coffee-cup-logo.png)](https://github.com/anishLearnsToCode/leetcode-algorithms/blob/master/src/WordPattern.java) [![Python](https://img.icons8.com/color/35/000000/python.png)](python/word_pattern.py) |
 | 292 | [Nim Game](https://leetcode.com/problems/nim-game) | Easy | [![Java](https://img.icons8.com/color/40/000000/java-coffee-cup-logo.png)](https://github.com/anishLearnsToCode/leetcode-algorithms/blob/master/src/NimGame.java) [![Python](https://img.icons8.com/color/35/000000/python.png)](python/nim_game.py) |
-| 293 | [Flip Game](https://leetcode.com/problems/flip-game) | Easy | |
+| 293 | 🔒 [Flip Game](https://leetcode.com/problems/flip-game) | Easy | |
 | 299 | [Bulls and Cows](https://leetcode.com/problems/bulls-and-cows) | Easy | [![Java](https://img.icons8.com/color/40/000000/java-coffee-cup-logo.png)](https://github.com/anishLearnsToCode/leetcode-algorithms/blob/master/src/BullsAndCows.java) |
 | 303 | [Range Sum Query - Immutable](https://leetcode.com/problems/range-sum-query-immutable) | Easy | [![Java](https://img.icons8.com/color/40/000000/java-coffee-cup-logo.png)](https://github.com/anishLearnsToCode/leetcode-algorithms/blob/master/src/RangeSumQueryImmutable.java) |
 | 326 | [Power of Three](https://leetcode.com/problems/power-of-three) | Easy | [![Java](https://img.icons8.com/color/40/000000/java-coffee-cup-logo.png)](https://github.com/anishLearnsToCode/leetcode-algorithms/blob/master/src/PowerOfThree.java) |