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String

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  1. Find the smallest window in a string containing all characters of another string

    Revise if you have time

  2. Print all interleavings of given two strings

    Recursion.

  3. Lexicographic rank of a string

    Interesting solution... uses factorial

  4. An in-place algorithm for String Transformation

    Unlikely to come.. complicated algo.... ask pavan

  5. Given a sequence of words, print all anagrams together
  6. String matching where one string contains wildcard characters

    Revise solution

Stacks

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  1. The Stock Span Problem

    Interesting and easy

  2. Iterative Postorder Traversal | Set 2 (Using One Stack) - GeeksforGeeks

    Simple

  3. Largest Rectangular Area in a Histogram

    ask pavan

  4. Print ancestors of a given binary tree node without recursion
  5. Length of the longest valid substring

    Imp revise

  6. Sort a stack using recursion

    Interesting solution

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