day 7, make some

d07/perfs.txt

@@ -0,0 +1,6 @@
+
+
+awk '{print 3^(NF-2)}' input | sum0
+15'721'434 operations total
+13'090'754 thanks to "any"
+7'805'608 thanks to "target"

d07/run.py

@@ -1,30 +1,29 @@
 import sys
-from math import *
+from typing import Generator as Gen
 
 PART2 = len(sys.argv)>1 and sys.argv[1] == "2"
 I = sys.stdin.read().strip().split("\n")
 
-def conccat(a, b):
+def conccat(a, b) -> int:
     # 12 345 become 12345
     # return a * pow(10, ceil(log10(b))) + b <= breaksfor 1000
     # but int <-> str convertions are slow (x4)
     return int(str(a)+str(b))
 
-def gen_nb(L:list[int]):
+def gen_nb(L:list[int]) -> Gen[int, None, None]:
     if len(L) == 1:
         yield L[0]
     else:
         for x in gen_nb(L[:-1]):
-            yield L[-1] * x
-            yield L[-1] + x
+            yield x * L[-1]
+            yield x + L[-1]
             if PART2:
                 yield conccat(x, L[-1])
 
 S = 0
 for l in I:
-    r, nb = l.split(":")
-    x = int(r)
+    x, nb = l.split(":")
+    x = int(x)
     nb = list(map(int,nb.strip().split(" ")))
-    S += x * any(x == a for a in gen_nb(nb))
+    S += x * (1 if any(x == a for a in gen_nb(nb)) else 0)
 print(S)
-        

d07/run_r.py

@@ -0,0 +1,35 @@
+import sys
+from typing import Generator as Gen
+
+PART2 = len(sys.argv)>1 and sys.argv[1] == "2"
+I = sys.stdin.read().strip().split("\n")
+
+def conccat(a, b) -> int:
+    # 12 345 become 12345
+    # return a * pow(10, ceil(log10(b))) + b <= breaksfor 1000
+    # but int <-> str convertions are slow (x4)
+    return int(str(a)+str(b))
+
+def gen_nb(L:list[int], target) -> Gen[int, None, None]:
+    if len(L) == 1:
+        yield L[0]
+    else:
+        for x in gen_nb(L[:-1], target):
+            z = x + L[-1]
+            if z <= target:
+                yield z
+            z = x * L[-1]
+            if z <= target:
+                yield z
+                if PART2: # concat is always bigger than mul, so it can be nested
+                    z = conccat(x, L[-1])
+                    if z <= target:
+                        yield z
+
+S = 0
+for l in I:
+    x, nb = l.split(":")
+    x = int(x)
+    nb = list(map(int,nb.strip().split(" ")))
+    S += x * (1 if any(x == a for a in gen_nb(nb, x)) else 0)
+print(S)