b main
r
s
exit
b main
r
p list->next
p list->next->next
p list->next->next->next
p list->next->next->next->next
s
p list->coord
p list->next->coord
p list->next->next->coord
p start
exit
b main
b 74
r
c
s
p list->start
p list->next->coord
p list->next->next->coord
p list->coord
exit
b main
p 74
c
r
s
p list->coord
p list->next->coord
p list->next->next->coord
exit
b 83
r
p list->coord
p list->next->coord
p list->next->next->coord
p list->next->next->next->coord
s
exit
r
s
exit
r
s
exit
b 87
n
s
r
c
p start[i]
p &start[i]
p &start
c
r
pstart
p end
s
p start
exit
b 85
c
r
exit