Canadian Computing Competition: 2021 Stage 1, Junior #3
Professor Santos has decided to hide a secret formula for a new type of biofuel. She has, however, left a sequence of coded instructions for her assistant.
Each instruction is a sequence of five digits which represents a direction to turn and the number of steps to take.
The first two digits represent the direction to turn:
- If their sum is odd, then the direction to turn is left.
- If their sum is even and not zero, then the direction to turn is right.
- If their sum is zero, then the direction to turn is the same as the previous instruction.
The remaining three digits represent the number of steps to take which will always be at least ~100~.
Your job is to decode the instructions so the assistant can use them to find the secret formula.
There will be at least two lines of input. Each line except the last line will contain exactly
five digits representing an instruction. The first line will not begin with
00. The last line
99999 and no other line will contain
There must be one line of output for each line of input except the last line of input. These
output lines correspond to the input lines (in order). Each output line gives the decoding of
the corresponding instruction: either
left, followed by a single space, followed by
the number of steps to be taken in that direction.
57234 00907 34100 99999
Output for Sample Input
right 234 right 907 left 100
Explanation of Output for Sample Input
The first instruction is
57234 which is decoded as
right 234 because ~5 + 7 = 12~ which is
57 is followed by
The second instruction is
00907 which is decoded with the same direction as the previous
right) but with
The third instruction is
34100 which is decoded as
left 100 because ~3 + 4 = 7~ which is odd
34 is followed by
The last line contains
99999 which tells us these are the only three instructions.