diff --git a/T.py b/T.py
new file mode 100644
index 0000000..1253604
--- /dev/null
+++ b/T.py
@@ -0,0 +1,12 @@
+import sys
+sys.setrecursionlimit(10**9+7)
+def fact(x):
+    if x == 0:
+        return 1
+    return x * fact(x - 1)
+n, r = map(int, input().split())
+r = min(r, n - r)   # optimization
+if r < 0:
+    print(0)
+else:
+    print(fact(n) // (fact(r) * fact(n - r)))
\ No newline at end of file