adds premium icon

Author: anishLearnsToCode

README.md

@@ -49,7 +49,7 @@
 | 167 | [Two Sum II - Input Array is Sorted](https://leetcode.com/problems/two-sum-ii-input-array-is-sorted) | Easy | [![Java](https://img.icons8.com/color/40/000000/java-coffee-cup-logo.png)](src/TwoSumIIInputArrayIsSorted.java) [![Python](https://img.icons8.com/color/35/000000/python.png)](python/two_sum_ii.py) |
 | 168 | [Excel Sheet Column Title](https://leetcode.com/problems/excel-sheet-column-title) | Easy | [![Java](https://img.icons8.com/color/40/000000/java-coffee-cup-logo.png)](src/ExcelSheetColumnTitle.java) [![Python](https://img.icons8.com/color/35/000000/python.png)](python/excel_sheet_column_title.py) | 
 | 169 | [Majority Element](https://leetcode.com/problems/majority-element) | Easy | [![Java](https://img.icons8.com/color/40/000000/java-coffee-cup-logo.png)](src/MajorityElement.java) [![Python](https://img.icons8.com/color/35/000000/python.png)](python/majority_element.py) | 
-| 170 | [Two Sum  III - Data Structure Design](https://leetcode.com/problems/two-sum-iii-data-structure-design) | Easy | |
+| 170 | [🔒 Two Sum  III - Data Structure Design](https://leetcode.com/problems/two-sum-iii-data-structure-design) | Easy | |
 | 171 | [Excel Sheet Column Number](https://leetcode.com/problems/excel-sheet-column-number) | Easy | [![Java](https://img.icons8.com/color/40/000000/java-coffee-cup-logo.png)](src/ExcelSheetColumnNumber.java) [![Python](https://img.icons8.com/color/35/000000/python.png)](python/excel_sheet_column_number.py) |
 | 172 | [Factoring Trailing Zeroes](https://leetcode.com/problems/factorial-trailing-zeroes) | Easy | [![Java](https://img.icons8.com/color/40/000000/java-coffee-cup-logo.png)](src/FactorialTrailingZeros.java) [![Python](https://img.icons8.com/color/35/000000/python.png)](python/factorial_trailing_zeroes.py) | 
 | 189 | [Rotate Array](https://leetcode.com/problems/rotate-array) | Easy | [![Java](https://img.icons8.com/color/40/000000/java-coffee-cup-logo.png)](src/RotateArray.java) [![Python](https://img.icons8.com/color/35/000000/python.png)](python/rotate_array.py) |