[algogeeks] Re: An interesting numerical sequence problem

2007-09-05 Thread [EMAIL PROTECTED]
I know you've solved the problem, but I'm bored. Would this work? I was never good at analysing time constraints Given an array n_1 n_2 ... n_k create another array called sums: n_1 n_1 + n_2 n_1 + n_2 + n_3 n_1 + n_2 + n_3 + ... n_k Take two indices min and max min = 0 max = f; while max < L

[algogeeks] Re: How to solve this problem efficiently?

2007-09-05 Thread adak
Of course, the index numbers lower than the book being checked out, don't need to be changed, just the higher numbers. I like using an array of structs with structure members which can group all the relevant data together that I want for that book, or student, etc. So Books[] might have: title,

[algogeeks] Re: How to solve this problem efficiently?

2007-09-05 Thread jliang
how about a doubled linked list where you can remove item at any index. the removing is O(1). you can also keep track of the current size S so if you are borrowing book at index greater than S/2, you traverse the list from the end, if index < S/2, you traverse from the beginning. every time a boo

[algogeeks] Re: An interesting numerical sequence problem

2007-09-05 Thread Sticker
To Adak, The problem is that the numbers are not consecutive in values. So 3 can be got from 6 subtracts 2 and 7 is added in. I got an idea from a friend on how to find max/min values on queues in constant time with insertion and deletion in constant times as well. By applying that idea to here

[algogeeks] Re: An interesting numerical sequence problem

2007-09-05 Thread adak
Darn it, I meant to post "Sticker shock", but my typo left out the 't'. . Thanks for the clarification, Sticker. I believe your algo can be tweaked a bit by simply adjusting your substring's info when you need to "go back" to the start of a substring. That is, when you drop the 2 from the substr