2017 progress.

2017/d6.py

@@ -0,0 +1,27 @@
+data = open(0).read().strip()
+
+# data = "0 2 7 0"
+banks = list(map(int, data.split()))
+seen = dict()
+seen[tuple(banks)] = 0
+
+c = 0
+while True:
+    c += 1
+    max_index = banks.index(max(banks))
+    blocks = banks[max_index]
+    banks[max_index] = 0
+    index = max_index
+    while blocks > 0:
+        index = (index + 1) % len(banks)
+        if index == max_index:
+            continue
+        banks[index] += 1
+        blocks -= 1
+
+    if tuple(banks) in seen:
+        break
+    seen[tuple(banks)] = c
+
+print(c)
+print(c - seen[tuple(banks)])