python-algorithm
[백준] 1010
무적김두칠
2021. 1. 21. 10:42
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import math
import sys
for _ in range(int(sys.stdin.readline())):
a,b=map(int,sys.stdin.readline().split())
print(math.factorial(b)//math.factorial(a)//math.factorial(b-a))
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cs |
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