|
| 1 | +# -------------------------------- Input data ---------------------------------------- # |
| 2 | +importos |
| 3 | + |
| 4 | +test_data= {} |
| 5 | + |
| 6 | +test=1 |
| 7 | +test_data[test]= { |
| 8 | +"input":"""^WNE$""", |
| 9 | +"expected": ["3","Unknown"], |
| 10 | +} |
| 11 | + |
| 12 | +test+=1 |
| 13 | +test_data[test]= { |
| 14 | +"input":"""^W(N|W)E$""", |
| 15 | +"expected": ["3","Unknown"], |
| 16 | +} |
| 17 | + |
| 18 | +test+=1 |
| 19 | +test_data[test]= { |
| 20 | +"input":"""^ENWWW(NEEE|SSE(EE|N))$""", |
| 21 | +"expected": ["10","Unknown"], |
| 22 | +} |
| 23 | + |
| 24 | +test+=1 |
| 25 | +test_data[test]= { |
| 26 | +"input":"""^ENNWSWW(NEWS|)SSSEEN(WNSE|)EE(SWEN|)NNN$""", |
| 27 | +"expected": ["18","Unknown"], |
| 28 | +} |
| 29 | + |
| 30 | +test+=1 |
| 31 | +test_data[test]= { |
| 32 | +"input":"""^ESSWWN(E|NNENN(EESS(WNSE|)SSS|WWWSSSSE(SW|NNNE)))$""", |
| 33 | +"expected": ["23","Unknown"], |
| 34 | +} |
| 35 | + |
| 36 | +test+=1 |
| 37 | +test_data[test]= { |
| 38 | +"input":"""^WSSEESWWWNW(S|NENNEEEENN(ESSSSW(NWSW|SSEN)|WSWWN(E|WWS(E|SS))))$""", |
| 39 | +"expected": ["31","Unknown"], |
| 40 | +} |
| 41 | + |
| 42 | +test="real" |
| 43 | +input_file=os.path.join( |
| 44 | +os.path.dirname(__file__), |
| 45 | +"Inputs", |
| 46 | +os.path.basename(__file__).replace(".py",".txt"), |
| 47 | +) |
| 48 | +test_data[test]= { |
| 49 | +"input":open(input_file,"r+").read().strip(), |
| 50 | +"expected": ["3207","8361"], |
| 51 | +} |
| 52 | + |
| 53 | +# -------------------------------- Control program execution ------------------------- # |
| 54 | + |
| 55 | +case_to_test="real" |
| 56 | +part_to_test=2 |
| 57 | + |
| 58 | +# -------------------------------- Initialize some variables ------------------------- # |
| 59 | + |
| 60 | +puzzle_input=test_data[case_to_test]["input"] |
| 61 | +puzzle_expected_result=test_data[case_to_test]["expected"][part_to_test-1] |
| 62 | +puzzle_actual_result="Unknown" |
| 63 | + |
| 64 | + |
| 65 | +# -------------------------------- Actual code execution ----------------------------- # |
| 66 | + |
| 67 | + |
| 68 | +forks= [{0:0}] |
| 69 | + |
| 70 | +positions= {0:0} |
| 71 | +dir= {"N":-1j,"S":1j,"E":1,"W":-1} |
| 72 | +movement=0 |
| 73 | +length=0 |
| 74 | + |
| 75 | +all_positions=tuple() |
| 76 | +positions_below_1000=tuple() |
| 77 | +forletterinpuzzle_input[1:-1]: |
| 78 | +ifletterin"NSEW": |
| 79 | +# Move ! |
| 80 | +positions= {pos+dir[letter]:positions[pos]+1forposinpositions} |
| 81 | +positions_below_1000+=tuple(xforxinpositionsifpositions[x]<1000) |
| 82 | +all_positions+=tuple(xforxinpositions) |
| 83 | +elifletter=="(": |
| 84 | +# Put current positions in the queue (= start of fork) |
| 85 | +forks.append(positions) |
| 86 | +# Initiate the "last fork targets" that'll get updated later |
| 87 | +forks.append({}) |
| 88 | +elifletter=="|": |
| 89 | +# Update the "last fork targets" (forks[-1]), then reset to forks[-2] |
| 90 | +forks[-1]= { |
| 91 | +pos:min(forks[-1][pos],positions.get(pos,10**6))forposinforks[-1] |
| 92 | + } |
| 93 | +forks[-1].update( |
| 94 | + {pos:positions[pos]forposinpositionsifposnotinforks[-1]} |
| 95 | + ) |
| 96 | +positions=forks[-2] |
| 97 | +elifletter==")": |
| 98 | +# Merge the current positions, the last fork targets (forks[-1]) and the positions before forking (forks[-2]) |
| 99 | +positions.update( |
| 100 | + {pos:min(forks[-1][pos],positions.get(pos,10**6))forposinforks[-1]} |
| 101 | + ) |
| 102 | +positions.update( |
| 103 | + {pos:min(forks[-2][pos],positions.get(pos,10**6))forposinforks[-2]} |
| 104 | + ) |
| 105 | +# Then go back to before the forking |
| 106 | +forks.pop() |
| 107 | +forks.pop() |
| 108 | + |
| 109 | +# Merge all forks with the most recent positions |
| 110 | +forforkinforks: |
| 111 | +positions.update({pos:min(fork[pos],positions.get(pos,10**6))forposinfork}) |
| 112 | + |
| 113 | + |
| 114 | +ifpart_to_test==1: |
| 115 | +puzzle_actual_result=max(positions.values()) |
| 116 | + |
| 117 | +else: |
| 118 | +puzzle_actual_result=len(set(all_positions))-len(set(positions_below_1000)) |
| 119 | + |
| 120 | + |
| 121 | +# -------------------------------- Outputs / results --------------------------------- # |
| 122 | + |
| 123 | +print("Expected result : "+str(puzzle_expected_result)) |
| 124 | +print("Actual result : "+str(puzzle_actual_result)) |