http://www.codechef.com/problems/EASYPROB/ plz explain the question

# a very easy problem

@code_baba:

The problem asks you to output some form of these numbers: 137, 1315, 73, 136, 255, 1384, 16385, one per line in the listed order.

Let’s see the first line of the correct output:

137=2(2(2)+2+2(0))+2(2+2(0))+2(0)

Hmmm… I don’t want to take the fun out the problem by giving the answer directly to you. So, I will give you a clue.

The clue:

If you have been thinking in this direction :

“How can I make the left hand side (in this case 137) to become the right hand side?”

Stop thinking!

The right direction to think for this problem is:

“How can I make the RIGHT HAND SIDE of the equation to become the left hand side?”

Got it?

**Just notice the number being used again and again and you will be able to find the pattern.(Did you know :2^2=4)**

**purush_ninja**#3

Hi

In this problem you have to represent the given number in form of sum if **2^n** where **n>=0**

for example

5=4+1=(2^2)+(2^0)

For 1-10

0=0

1=2(0)

2=2

3=2+2(0)

4=2(2)

5=2(2)+2(0)

6=2(2)+2

7=2(2)+2+2(0)

8=2(2+2(0))

9=2(2+2(0))+2(0)

10=2(2+2(0))+2

Hint:

137 = 128 + 8 + 1

1315 = 1024 + 256 + 32 + 2 + 1

73 = 64 + 8 + 1

136 = 128 + 8

255 = 128 + 64 + 32 + 16 + 8 + 4 + 2 + 1

1384 = 1024 + 256 + 64 + 32 + 8

16385 = 16384 + 1

Every number can be written as sum of powers of 2 with each power used only once or never