MinskyMystery
SRM 529 · 2011-11-22 · by misof
Problem Statement
Marvin plays a simple game. The game is played with an infinite supply of marbles and five bags, labeled "bag 0" through "bag 4".
At the beginning, Marvin takes N marbles (where N is a nonnegative integer) and places them into bag 0. The remaining four bags are left empty. Marvin then follows this simple algorithm:
Add a marble into bag 1.
Repeat forever:
Add a marble into bag 1.
Empty bag 4.
While there are marbles in bag 0:
While there are marbles both in bag 0 and in bag 1:
Remove a marble from bag 0.
Remove a marble from bag 1.
Add a marble into bag 2.
Add a marble into bag 3.
End While
Add a marble into bag 4.
If bags 0 and 1 are both empty:
Move all marbles from bag 3 to bag 4.
TERMINATE THE GAME
End If
Move all marbles from bag 3 to bag 1.
End While
Move all marbles from bag 2 to bag 0.
End Repeat
You are given a
Notes
- Suppose there are M marbles in bag A. The instruction "Move all marbles from bag A to bag B." then counts as M individual moves.
- Note that N is allowed to be zero.
Constraints
- N will be between 0 and 10^12, inclusive.
2 Returns: 9
3 Returns: 27
4 Returns: 16
2401 Returns: 59058
0 Returns: -1
Submissions are judged against all 172 archived test cases, of which 5 are shown here. Case numbers match the judge’s.
Language: C++17 · define a public class MinskyMystery with a public method int computeAnswer(long long N) · 172 test cases · 2 s / 256 MB per case