[백준 11050] 이항 계수1
11050번 : 이항 계수1
방법 1
import sys
def factorial(n):
ans = 1
for i in range(2, n+1):
ans *= i
return ans
n, k = map(int, sys.stdin.readline().split())
print(factorial(n) // factorial(n-k) // factorial(k))
import sys
def factorial(n):
ans = 1
for i in range(2, n+1):
ans *= i
return ans
n, k = map(int, sys.stdin.readline().split())
print(factorial(n) // factorial(n-k) // factorial(k))