Update README.md

Author: fengvyi

README.md

@@ -153,6 +153,7 @@ My C++ solutions of [LeetCode Online Judge](https://leetcode.com/problemset/algo
 | 441 | [Arranging Coins](https://leetcode.com/problems/arranging-coins/description/) | [C++](https://github.com/fengvyi/LeetCode/blob/master/C%2B%2B/441.%20Arranging%20Coins.cpp) | Easy | Math | [discuss](https://discuss.leetcode.com/topic/92001/3-lines-c-easy-to-understand) |
 | 461 | [Hamming Distance](https://leetcode.com/problems/hamming-distance/description/) | [C++](https://github.com/fengvyi/LeetCode/blob/master/C%2B%2B/461.%20Hamming%20Distance.cpp) | Easy | Bit Manipulation | [discuss](https://discuss.leetcode.com/topic/85931/4-lines-c-3ms) |
 | 477 | [Total Hamming Distance](https://leetcode.com/problems/total-hamming-distance/description/) | [C++](https://github.com/fengvyi/LeetCode/blob/master/C%2B%2B/477.%20Total%20Hamming%20Distance.cpp) | Medium | Bit Manipulation | [discuss](https://discuss.leetcode.com/topic/100420/7-lines-c-o-n) |
+| 482 | [License Key Formatting](https://leetcode.com/problems/license-key-formatting/description/) | [C++](https://github.com/fengvyi/LeetCode/blob/master/C%2B%2B/482.%20License%20Key%20Formatting.cpp) | Medium | Array | [discuss](https://discuss.leetcode.com/topic/104317/9ms-straight-forward-c) |
 | 494 | [Target Sum](https://leetcode.com/problems/target-sum/description/) | [C++](https://github.com/fengvyi/LeetCode/blob/master/C%2B%2B/494.%20Target%20Sum.cpp) | Medium | Backtracking | [discuss](https://discuss.leetcode.com/topic/100319/clean-c-backtrack-dp) |
 | 523 | [Continuous Subarray Sum](https://leetcode.com/problems/continuous-subarray-sum/description/) | [C++](https://github.com/fengvyi/LeetCode/blob/master/C%2B%2B/523.%20Continuous%20Subarray%20Sum.cpp) | Medium | Dynamic Programming | [discuss](https://discuss.leetcode.com/topic/101395/share-my-not-too-long-c-solution) |
 | 525 | [Contiguous Array](https://leetcode.com/problems/contiguous-array/description/) | [C++](https://github.com/fengvyi/LeetCode/blob/master/C%2B%2B/525.%20Contiguous%20Array.cpp) | Medium | Hash Table | [discuss](https://discuss.leetcode.com/topic/100412/10-lines-c) |