2019 day 17 complete

2019/d17.py

@@ -51,9 +51,11 @@ def find_path(g):
                 path += "R"
                 dir = DIRS[(DIRS.index(dir) + 1) % len(DIRS)]
                 g[pos] = DIRCHAR[DIRS.index(dir)]
-        g.print()
-        input()
-        print()
+
+        # For debugging:
+        # g.print()
+        # input()
+        # print()
     path = path.replace("RRR", "L")
     return path
 
@@ -81,14 +83,48 @@ def part_1(data):
                 # g[(r, c)] = 'o'
                 result += r * c
     print(result)
-    g.print()
-    path = find_path(g)
-    print(path)
+    # g.print()
 
-    # xs = str_to_ints(data)
-    # xs[0] = 2
-    # a = Amp(xs)
-    # a.go()
+    # Merge F commands into counts
+    path = find_path(g)
+    path = list(path)
+    new_path = []
+    i = 0
+    while i < len(path):
+        if path[i] == "R":
+            new_path.append("R")
+            i += 1
+        elif path[i] == "L":
+            new_path.append("L")
+            i += 1
+        elif path[i] == "F":
+            count = 0
+            while i < len(path) and path[i] == "F":
+                count += 1
+                i += 1
+            new_path.append(str(count))
+        else:
+            assert False
+    path = new_path
+    print("Manually translate into commands:", "".join(path))
+
+    # manually created from above output
+    inst = (
+        "A,A,B,C,B,C,B,C,A,C\n"
+        "R,6,L,8,R,8\n"
+        "R,4,R,6,R,6,R,4,R,4\n"
+        "L,8,R,6,L,10,L,10\n"
+        "n\n"
+    )
+
+    xs = str_to_ints(data)
+    xs[0] = 2
+    a = Amp(xs)
+    for c in inst:
+        a.feed(ord(c))
+    while not a.done:
+        a.go()
+    print(a.outputs[-1])
 
 
 def main():

README.md

@@ -128,7 +128,7 @@ Solutions and utility script for Advent of Code challenges in Python.
 - Day 14: >120:00 (Hmm, wasn't that hard either.)
 - Day 15: >120:00 (I am really weak at the moment.)
 - Day 16:
-- Day 17:
+- Day 17: days    (Fun but too tricky for me to be fast.)
 - Day 18:
 - Day 19: 40:00 (Way too slow! Oversight error. Come on.)
 - Day 20: