2016/19

y2016/p19.py

+import collections
+import sys
+
+
+text = sys.stdin.read()
+lim = int(text) + 1
+
+elves = collections.deque(range(1, lim + 1))
+while len(elves) > 1:
+    elves.rotate(-1)
+    elves.popleft()
+print(elves[0])
+
+half1 = collections.deque(range(1, lim // 2 + 1))
+half2 = collections.deque(range(lim // 2 + 1, lim + 1))
+while half1 and half2:
+    half1.pop() if len(half2) < len(half1) else half2.popleft()
+    half2.append(half1.popleft())
+    half1.append(half2.popleft())
+print([*half1, *half2][0])