Example 1

13 → 1101

Example 2

25 → 11001

Example 3

255 → 11111111

Example 4

100 → 1100100

Example 5

7 → 111

Example 1

1101 → 13

Example 2

11001 → 25

Example 3

10101 → 21

Example 4

11111111 → 255

Example 5

1000 → 8