Question

i need to write algo for this problem. i have never written an algo before . please correct me.

there is a list which contains four collumns each with numbers with upto 5 digits and about 10 rows in total. we have to remove the rows containng any number with less than 3 digits.
here is how i have tried

1. read list into multi-dimensional array
2. for each number in the array
   if numdigits < 3
   delete all numbers of that row

i know this is not the correct algorithm . can you help me correct it .

Answer 1

When creating your original list, rather check the individual values then, and not add it to that list if any of the numbers has less than 3 digits, that way reducing the original list size.

EDIT:

foreach row in original_document
{
    bool allMoreThan3Digits = true
    foreach cell in row
        allMoreThan3Digits = allMoreThan3Digits && (ABS(cell.Value) >= 100)

    if (allMoreThan3Digits)
        add row to new list
}

Something like that.