Increasing decreasing sequence

#1

how to make the program strictly increasing or decreasing ?i have passed 4 test cases but 5 test cases goes wrong? how to resolve this problem??

#2

@amishakumari
the approach for solving is pretty simple keep increasing the i till i-1 <= i and when it is voilated keep increasing i till i-1 >= i. It i == n in the end then its increasing decreasing sequence.

bool increasingDecreasing(int n)
{
    int prev;
    cin >> prev;

    bool isValid = true;
    bool isDecreasing = true;

    while (--n)
    {
        int curr;
        cin >> curr;
        if (curr == prev)
        {
            isValid = false;
            break;
        }
        else if (curr > prev)
        {
            isDecreasing = false;
        }
        else if (!isDecreasing && curr < prev)
        {
            isValid = false;
            break;
        }

        prev = curr;
    }

    return isValid;
}
#3

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