Все задачи на 5.10.17 13:00

uts/session_py/dist_march_2k17/Business.py

@@ -0,0 +1,20 @@
+import sys
+
+sys.stdin = open("input.txt", "r")
+sys.stdout = open("output.txt", "w")
+
+n = int(input())
+c = [None for i in range(n+1)]
+for i in range(1, n, 2):
+    c[i] = 0
+c[2] = 1
+c[0] = 1
+def recursion(n, c):
+    if c[n] != None:
+        return c[n]
+    kkk = 0
+    for i in range(1, n):
+        kkk += recursion(i-1, c) * recursion(n-i-1, c)
+    c[n] = kkk
+    return kkk
+print(recursion(n, c))