# 2003 (c) by Marcus Thiesen
# <marcus@cpan.org>
# This program is under GPL
# See the LICENSE file
### This URM program
### computes the distance
### between two numbers

in(r1,r2)

1: if r1 = 0 goto 6
2: if r2 = 0 goto 6
3: r1 <- r1 - 1
4: r2 <- r2 - 1
5: goto 1
6: if r1 = 0 goto 11
7: if r1 = 0 goto 15
8: r1 <- r1 - 1
9: r3 <- r3 + 1
10: goto 7
11: if r2 = 0 goto 15
12: r2 <- r2 - 1
13: r3 <- r3 + 1
14: goto 11

out(r3)