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Hey take a look at this if it helps
from math import factorial n=int(raw_input()) for i in range(n): a,b=map(int,raw_input().split()) print (factorial(a+b-1)/(factorial(a)*factorial(b-1)))%1000000007
Sherlock and Permutations
You are viewing a single comment's thread. Return to all comments →
Hey take a look at this if it helps