[py] Port 2015_04

py/aoc/y2015/d04.py

@@ -0,0 +1,29 @@
+import hashlib
+
+# PART 1
+
+
+def leading_zeroes(amount, start):
+    n = 1
+    what = "0" * amount
+    while True:
+        text = (start + str(n)).encode("utf-8")
+        h = hashlib.md5(text).hexdigest()
+        if h[:amount] == what:
+            return n
+
+        # if n % 100000 == 0:
+        #     print(f"{n:9} {text} {h}")
+
+        n += 1
+
+
+# PART 2
+
+
+def solve(inputstr):
+    hashstart = inputstr.strip()
+    n = leading_zeroes(5, hashstart)
+    print(f"Part 1: {n}")
+    n_2 = leading_zeroes(6, hashstart)
+    print(f"Part 2: {n_2}")