I don't konw why answer is 6?


  • 1
    B

    The case [6,1,3,2,4,7] which expected ouput is 6.My output is 7.My solution is,at the second day i buy,and the third day sell,the fourth day buy it ,the sixth day sell it .Why the answer is 6?


  • 2
    V

    The question is equivalent to the following:

    Find the value that is maximum of Aj – Ai, where i < j.

    In the input case [6,1,3,2,4,7] buy when stock price is 1 and sell when stock price is 7, and the maximum profit is 6.


  • 0
    B

    thanks you,i understood.


  • 0
    G

    Only ONE transaction is allowed if you read the problem carefully.


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