i am getting TLE for MARBLES please someone help me
import math
for i in range(1):
try:
n=input()
except EOFError:
break
for i in range(n):
try:
a,b=map(int,raw_input().split())
a=a-1
b=b-1
ac=a-b
n=1
r=1
x=1
while a!=ac:
n=n*a
a=a-1
while b!=0:
r=r*b
b=b-1
res=n/r
print res
except EOFError:
break
except ValueError:
break
except ZeroDivisionError:
break
