Actually the Address is not Definite as 01F~
Here's a tip: (For those who can't seem to get the address)
The thing you need is a pair of Address with Values of 2 after the second scan
(The Initial and Final Letters/Numbers differ each PC)
After the third kill, observe two addresses which will change their values to 3
(These 2 Addresses are beside each other)
After that (of course you'll win)
Observe the two values if they'll go 0 in the Room.
If yes, then that's the Address Freeze it to 30.
Footnotes:
In this PC mine is 020****