2014-10-12 16:06
HyperDunk
thankyou
2014-10-12 16:30
citizen1987
thnks a lot
2014-10-22 17:48
tea4jack
How many non-negative integral solutions of (x, y, z) are there for the equation x + y + z = 15?
2014-10-22 18:32
shbcharles
1111111111111111111
2014-10-22 20:57
qqaque
thanks thanks thanks
2014-10-22 21:17
yioadxn
:32: :32:
2014-10-24 19:15
chingkoo2007
11111111111111111111111111
2014-10-24 21:14
sino1962
thank you for sharing
2014-10-24 22:30
匿名
ccccccc
2014-10-25 11:09
feiyenkn
thx for sharing