|
| 1 | +# -------------------------------- Input data -------------------------------- # |
| 2 | +importos,math |
| 3 | + |
| 4 | +test_data= {} |
| 5 | + |
| 6 | +test=1 |
| 7 | +test_data[test]= {"input":5, |
| 8 | +"expected": [3,'Unknown'], |
| 9 | + } |
| 10 | + |
| 11 | +test+=1 |
| 12 | +test_data[test]= {"input":15, |
| 13 | +"expected": ['Unknown','Unknown'], |
| 14 | + } |
| 15 | + |
| 16 | +test='real' |
| 17 | +test_data[test]= {"input":3012210, |
| 18 | +"expected": ['1830117','1417887'], |
| 19 | + } |
| 20 | + |
| 21 | +# -------------------------------- Control program execution -------------------------------- # |
| 22 | + |
| 23 | +case_to_test='real' |
| 24 | +part_to_test=2 |
| 25 | +verbose_level=1 |
| 26 | + |
| 27 | +# -------------------------------- Initialize some variables -------------------------------- # |
| 28 | + |
| 29 | +puzzle_input=test_data[case_to_test]['input'] |
| 30 | +puzzle_expected_result=test_data[case_to_test]['expected'][part_to_test-1] |
| 31 | +puzzle_actual_result='Unknown' |
| 32 | + |
| 33 | + |
| 34 | +# -------------------------------- Actual code execution -------------------------------- # |
| 35 | + |
| 36 | +ifpart_to_test==1: |
| 37 | +elves=list(range(1,puzzle_input+1)) |
| 38 | + |
| 39 | +whilelen(elves)>1: |
| 40 | +iflen(elves)%2==1: |
| 41 | +elves=elves[::2][1:] |
| 42 | +else: |
| 43 | +elves=elves[::2] |
| 44 | + |
| 45 | +puzzle_actual_result=elves[0] |
| 46 | + |
| 47 | +else: |
| 48 | +# For some reason, the value for any power of 3 is equal to itself |
| 49 | +# If X is a power of 3: |
| 50 | +# Numbers N from X+1 to 2*X have N-X as a result (it increases by 1) |
| 51 | +# Numbers N from 2*X to 3*X-1 have 2*N-3*X as a result (it increases by 2) |
| 52 | + |
| 53 | +# Find the power of 3 right below the puzzle input |
| 54 | +power_of_3=3**math.trunc(math.log(puzzle_input,3)) |
| 55 | + |
| 56 | +ifpuzzle_input<=2*power_of_3: |
| 57 | +puzzle_actual_result=puzzle_input-power_of_3 |
| 58 | +else: |
| 59 | +puzzle_actual_result=puzzle_input*2-power_of_3*3 |
| 60 | + |
| 61 | + |
| 62 | +# -------------------------------- Outputs / results -------------------------------- # |
| 63 | + |
| 64 | +ifverbose_level>=3: |
| 65 | +print ('Input : '+puzzle_input) |
| 66 | +print ('Expected result : '+str(puzzle_expected_result)) |
| 67 | +print ('Actual result : '+str(puzzle_actual_result)) |
| 68 | + |
| 69 | + |
| 70 | + |
| 71 | + |