1. GMACRO
niteng
let k1 = count (c1)
do k2= 1:k1-1
do k3= k2+1:k1
if c1(k2) > c1(k3)
let k4 = x(k2)
let x(k2) = x(k3)
let x(k3) = k4
endif
enddo
enddo
let k5=mod(k1,2)
if k5=0
let k6 = 1/2*(c1((k1+2)/2) + c1(k1/2)))
else
let k6 = c1((k1+1)/2)
endif
print kl C1(K2) K6
ENDMACRO