PROGRAM FILES

• two stacks
• Reverse a string using stack
• Min stack
• Sort a stack
• Valid parenthesis
• Redudant bracket
• Longest Valid Parenteses
• Reverse a stack
• next smaller element
• Previous smaller element
• Final prices with special discount (my approach - Not optimized)
• Largest Histogram (not optimized code) (V.V.V.V.V.V.V.V.IMP)
• Next greater element (my approach)
• Next greater element ( optimised approach)
• Remove all adjacent characters in string
• Online stock span
• Max freq stack (my code — shittiest approach ever)
• Max Frequency stack ( revise once again)
• Simplify path
• Check if word is valid after substitutions
• Decode string
• Car fleet
• Validate stack sequences

Handwritten Notes :