6Companies30days


Question Link Logic ( Click for code ) C
1. Buy & Sell Stock IV   H
2. LongestMountain while iterating : find inc, find dec , ht = max(inc+dec+1,ht) M
3. Sliding Window Maximum   H
4. Brackets in MatrixChain    
5. Phone Directory    
6. First Non Repeating Char    
7. Max of all subarray    
8. Ways to Nth Chair    
9. Valid Sudoku   M
10. Nuts & Bolts    
11. Serialize & Desrialize Tree    
12. ColumnNameFrom#    
13. Rotten Oranges    
14. Burning Tree    
15. Delete M nodes after N    


References

Arsh Goyal Amazon Sheet