/* exact semantics:
   if (n>=101) then n-10 else 91 */
proc MC(n:int) returns (r:int)
var t1:int, t2:int;
begin
  if (n>100) then
     r = n-10;
  else 
     t1 = n + 11;
     t2 = MC(t1);
     r = MC(t2);
  endif;
end

var
a:int, b:int;
begin
  b = MC(a);
end