промежутое

programm12.py

@@ -0,0 +1,24 @@
+f = open('INPUT.TXT')
+n, m = map(int, f.readline().split())
+f.close()
+
+def factorial(x):
+    if x <= 1:
+        return 1
+    result = 1
+    for i in range(2, x + 1):
+        result = result * i
+    return result
+
+def binomial(n, k):
+    if k > n or k < 0:
+        return 0
+    return factorial(n) // (factorial(k) * factorial(n - k))
+
+count = 0
+for k in range(m, n + 1):
+    count = count + binomial(n, k)
+
+f = open('OUTPUT.TXT', 'w')
+f.write(str(count))
+f.close()