SDE - Intern

You have been given 'N' ropes of different lengths, we need to connect these ropes into one rope. The cost to connect two ropes is equal to sum of their lengths. We need to connect the ropes with minimum cost.

The test-data is such that the result will fit into a 32-bit integer.

Alex has a computer with ‘K’ memory spaces. He has a list of ‘N’ different document downloads that he would like to do, each of which consumes some unique memory usage. He also has ‘M’ computer games, each of which consumes some unique memory usage. His computer can allow at most one download and at most one game to run simultaneously, provided that the sum of memory usages doesn’t exceed ‘K’. Alex wants to play at most one game and complete at most one download so that the total memory usage is maximum.

Given a list ‘download’ and a list ‘game’, help Alex find out the number of pairs of downloads and games such that the sum of memory usages is maximum. It can also be possible that Alex only plays a game or performs a download at a time.

You have been given a binary tree of 'N' nodes. Print the Spiral Order traversal of this binary tree.

For example

For the given binary tree [1, 2, 3, -1, -1, 4, 5, -1, -1, -1, -1]
    1
   / \
  2   3
     / \
    4   5

Output: 1 3 2 4 5