Algorithms and Data Structures

  • Profound Academy

    • Status
      • 1
        Implementation
      • 2
        Bitwise operations
      • 3
        Prefix Sums
      • 4
        Sliding window / Two pointers
      • 5
        Modular Arithmetic
      • 6
        Number Theory
      • 7
        Binary Search
      • 8
        Basic Sorting
      • 9
        Greedy Algorithms
      • 10
        Basic Dynamic Programming
      • 11
        Recursion
      • 12
        Linked LIst
      • 13
        Queue & Stack
      • 14
        Binary tree + BST
      • 15
        Divide & Conquer + Advanced Sorting
      • 16
        Heap
      • 17
        Hashing
      • 18
        Graph Representation
      • 19
        BFS

  • Longest substring with no duplicate letters

    Given a string s, you are asked to calculate the longest substring of s with no duplicate letters. The program should print the first occurring one in case of multiple such strings.

    Input

    The only line of the input contains a string s (1 ≤ |s| ≤ ). s can contain Latin letters, ASCII symbols (~,#$-=_|\/+%^&*()[]’”.!@), spaces, and tabs.

    Output

    The program should print the longest substring of s with all unique letters.

    Examples

    Input
    Output
    hello, world!
    , world!
     

    Constraints

    Time limit: 1 seconds

    Memory limit: 512 MB

    Output limit: 1 MB

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