The green internet café X83787


Statement
 

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Public test cases

  • Input

    3
1 4
2 5
3 6

    Output

    3

  • Input

    5
1 2
2 3
3 4
4 5
5 6

    Output

    1

  • Input

    7
13 19
6 18
5 6
8 9
2 9
10 11
12 15

    Output

    3
    • Information
    Author
    HP Codewars BCN
    Language
    English
    Official solutions
    Python
    User solutions
    C++ Haskell Python