Problems

Problems

1. Two Sums1.Intersection of Two Arrays2.Happy Number3.Contains Duplicate4.Find the Duplicate Number5. Find All Duplicates in an Array6. Isomorphic Strings7. Group Anagrams8. Single Number9.Valid Sudoku10.Jewels and Stones11.First Missing Positive12. LRU Cache (V.IMP)13. Encode and Decode TinyURL14. Alphabet Board Path