Day 7

aoc-7/inputs.txt

@@ -0,0 +1,101 @@
+Step D must be finished before step L can begin.
+Step B must be finished before step G can begin.
+Step N must be finished before step Z can begin.
+Step V must be finished before step Y can begin.
+Step G must be finished before step R can begin.
+Step E must be finished before step L can begin.
+Step O must be finished before step W can begin.
+Step Q must be finished before step X can begin.
+Step Y must be finished before step J can begin.
+Step W must be finished before step R can begin.
+Step H must be finished before step P can begin.
+Step L must be finished before step P can begin.
+Step X must be finished before step T can begin.
+Step S must be finished before step K can begin.
+Step U must be finished before step R can begin.
+Step P must be finished before step Z can begin.
+Step A must be finished before step Z can begin.
+Step M must be finished before step F can begin.
+Step Z must be finished before step K can begin.
+Step J must be finished before step K can begin.
+Step I must be finished before step C can begin.
+Step K must be finished before step C can begin.
+Step R must be finished before step C can begin.
+Step T must be finished before step F can begin.
+Step F must be finished before step C can begin.
+Step E must be finished before step C can begin.
+Step H must be finished before step S can begin.
+Step X must be finished before step K can begin.
+Step E must be finished before step Y can begin.
+Step I must be finished before step T can begin.
+Step T must be finished before step C can begin.
+Step R must be finished before step T can begin.
+Step X must be finished before step U can begin.
+Step I must be finished before step R can begin.
+Step I must be finished before step K can begin.
+Step L must be finished before step A can begin.
+Step P must be finished before step C can begin.
+Step D must be finished before step S can begin.
+Step Q must be finished before step A can begin.
+Step N must be finished before step G can begin.
+Step W must be finished before step P can begin.
+Step B must be finished before step E can begin.
+Step M must be finished before step T can begin.
+Step L must be finished before step C can begin.
+Step E must be finished before step F can begin.
+Step M must be finished before step I can begin.
+Step M must be finished before step Z can begin.
+Step U must be finished before step F can begin.
+Step W must be finished before step K can begin.
+Step E must be finished before step W can begin.
+Step B must be finished before step W can begin.
+Step A must be finished before step I can begin.
+Step M must be finished before step K can begin.
+Step X must be finished before step F can begin.
+Step O must be finished before step Z can begin.
+Step W must be finished before step C can begin.
+Step Q must be finished before step M can begin.
+Step K must be finished before step R can begin.
+Step Y must be finished before step C can begin.
+Step A must be finished before step T can begin.
+Step G must be finished before step L can begin.
+Step G must be finished before step A can begin.
+Step J must be finished before step I can begin.
+Step N must be finished before step R can begin.
+Step D must be finished before step W can begin.
+Step L must be finished before step R can begin.
+Step Y must be finished before step P can begin.
+Step S must be finished before step M can begin.
+Step O must be finished before step I can begin.
+Step Z must be finished before step J can begin.
+Step H must be finished before step M can begin.
+Step L must be finished before step K can begin.
+Step U must be finished before step M can begin.
+Step G must be finished before step T can begin.
+Step O must be finished before step L can begin.
+Step Z must be finished before step R can begin.
+Step N must be finished before step E can begin.
+Step U must be finished before step I can begin.
+Step G must be finished before step Q can begin.
+Step H must be finished before step R can begin.
+Step U must be finished before step C can begin.
+Step L must be finished before step U can begin.
+Step H must be finished before step Z can begin.
+Step P must be finished before step F can begin.
+Step I must be finished before step F can begin.
+Step B must be finished before step N can begin.
+Step J must be finished before step R can begin.
+Step O must be finished before step S can begin.
+Step Y must be finished before step T can begin.
+Step G must be finished before step S can begin.
+Step N must be finished before step O can begin.
+Step Y must be finished before step X can begin.
+Step B must be finished before step X can begin.
+Step A must be finished before step F can begin.
+Step Z must be finished before step I can begin.
+Step K must be finished before step F can begin.
+Step J must be finished before step C can begin.
+Step D must be finished before step G can begin.
+Step P must be finished before step M can begin.
+Step K must be finished before step T can begin.
+Step X must be finished before step M can begin.

aoc-7/main.py

@@ -0,0 +1,46 @@
+from collections import defaultdict
+
+inputs = open("inputs.txt", "r").read().split('\n')
+
+dependencies = defaultdict(set)
+
+for line in inputs:
+    dep = line.split()[1]
+    step = line.split()[7]
+
+    dependencies[step].add(dep)
+    if dep not in dependencies:
+        dependencies[dep] = set()
+
+
+steps = []
+while len(steps) < len(dependencies):
+    possibleNextSteps = list()
+
+    for key in sorted([ k for k in dependencies.keys() if k not in steps ]):
+        if dependencies[key].issubset(set(steps)):
+            possibleNextSteps.append(key)
+
+    nextStep = possibleNextSteps[0]
+    steps.append(nextStep)
+
+print(f"[Part 1] Steps: { ''.join(steps) }")
+
+alpha = list("_ABCDEFGHIJKLMNOPQRSTUVWXYZ")
+completedSteps = set()
+inProgress = dict()
+
+time = 0
+while len(completedSteps) < len(dependencies):
+    for step in [ step for step in steps if step not in completedSteps and step not in inProgress.keys() ]:
+        if dependencies[step].issubset(completedSteps) and len(inProgress) < 5:
+            inProgress[step] = alpha.index(step) + 60
+
+    for step in set(inProgress.keys()) - { k for k, v in inProgress.items() if v > 1 }:
+        completedSteps.add(step)
+
+    inProgress = { k : v - 1 for k, v in inProgress.items() if v > 1 }
+
+    time += 1
+
+print(f"[Part 2] Time taken: { time }")