def binomial_coefficient(n, r):
C = [0 for i in range(r + 1)]
# nc0 = 1
C[0] = 1
for i in range(1, n + 1):
# to compute current row from previous row.
j = min(i, r)
while j > 0:
C[j] += C[j - 1]
j -= 1
return C[r]
print(binomial_coefficient(n=10, r=5))
