Bad problem statement or missing test cases


  • 0
    E

    This problem has either a bad statement, or is missing test cases.

    If a solution is allowed to be O(target) time and/or memory, the problem statement should explicitly mention limits on target. For example, "it is guaranteed that target < 10^6".

    If no such bound is giving on target, it cannot be assumed that solutions may use O(target) time/memory, and all those solutions which do should be failed by a test case like the following

    nums =[1073741823, 715827882, 715827882, 306783378, 195225786, 69273666, 14221746, 6487866]
    target=2147483646

    The target above is target = 2^31 - 2, which has factors [2, 3, 3, 7, 11, 31, 151, 331].
    The nums above are nums = [target/factor for factor in factors]

    The correct answer appears to be 14.

    Most solutions which are O(target) should see TLE. Either a test case failing O(target) solutions should be added, or a limit on target should be given in the problem statement.


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