Something is wrong with this code

for this code
input  2 7
output 4

But in fact
xxxxxxx
xxxxxxx
go
xxxxx
xxxxx
     xx
go
xxxxx
xxxxx
    x
go
xxx  x
xxxxx
    x
go
xxx xx
xxxx
go
xxxx
xxxx
go
xx
xx
  xx
go
xx
xx
 x
go
  x
xx
 x
go
 xx
x
go
x
x
go
x
There is only one left.

• Data is weakless! (3) new_star 2008-12-22 14:40:24
• Re:Something is wrong whis this code (115) Zenomyth 2015-02-13 17:50:57
  • Re:Something is wrong whis this code (391) Zenomyth 2015-02-13 18:09:03