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- import sys
- def silnia(a, b):
- wynik=1;
- for x in range(a, b+1):
- wynik*=i
- return wynik
- t = int(input())
- for x in range(0, t):
- n = int(input())
- k = int(input())
- if k == 0:
- print("1")
- elif k == n:
- print("1")
- else:
- print (silnia(k+1,n)/silnia(1,n-k))
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