WA in SOLDIERS

[Man_Mohan_Mishra]

Sir , I am solving the problem https://www.spoj.com/problems/SOLDIERS/.
I have tried many test cases and my code gives correct answers , but on submitting it gives WA.
Can I post my code here ?

[daft_wullie]

Yes, it is not uncommon to post code here . Just remember to use code tags or bbone tags.

[Man_Mohan_Mishra]

sir , this is my code --

for i in range (int(raw_input())):
    try:
        a,b=map(int,raw_input().split(' '))
    except:continue
    if a%2==1:
        a=(a+1)/2
    else :
        b=(b+1)/2
    a=a*b
    print a

sir , please tell me where my code is failing.