A=B+C?
B=0?

C=0?

A=B?

A=C?

B=C?
A=23?

B=23?
.
A=B*C?
B=0?

B=1?

C=0?

C=1?

A=B?

B=C?
.
A=B-C?
C=0?

A=B?

A=0?

B=C?
.
A=B+B?
A=10?

B=10?
.
B=A-B?
A=34?

B=34?
.
A=B*A?
A=1?

B=1?

B=0?

A=0?
.
