python - Why is there an "Invalid literal error"? -

i getting right answer in ide online judge gives following error:

traceback (most recent call last):   file "/tmp/editor_trsource_1410281976_804149.py", line 10, in      n=int(raw_input('')) valueerror: invalid literal int() base 10: '100 10' 

problem link: http://www.hackerearth.com/problem/golf/minimal-combinatorial/

def fact(x):     f=1     while x>0:         f=f*x         x-=1     return f t=int(raw_input('')) while t>0:     n=int(raw_input(''))     r=int(raw_input(''))     ans=fact(n)/(fact(r)*fact(n-r))     print str(ans) + "\n"      t-=1 

n , r entered on same line.

100 10 

your program expects them entered on 2 separate lines.

100 10