solved 12a

2021/day12/12.py

@@ -0,0 +1,31 @@
+lines = [ i.split('-') for i in open("input.txt", 'r').read().splitlines()]
+
+paths = []
+
+di = {}
+for l in lines:
+    if l[0] not in di:
+        di[l[0]] = []
+    di[l[0]].append(l[1])
+    if l[1] not in di:
+        di[l[1]] = []
+    di[l[1]].append(l[0])
+
+print(di)
+
+def travel(stack, node):
+    stack.append(node)
+    if node == 'end':
+        paths.append(stack.copy())
+        print(stack)
+    for n in di[node]:
+        if n not in stack or n.isupper():
+            travel(stack,n)
+    stack.pop()
+
+for start in di['start']:
+    stack = ['start']
+    travel(stack, start)
+
+
+print(len(paths))