32 lines
552 B
Plaintext
32 lines
552 B
Plaintext
proc qselect k . list[] res .
|
|
#
|
|
subr partition
|
|
mid = left
|
|
for i = left + 1 to right
|
|
if list[i] < list[left]
|
|
mid += 1
|
|
swap list[i] list[mid]
|
|
.
|
|
.
|
|
swap list[left] list[mid]
|
|
.
|
|
left = 1
|
|
right = len list[]
|
|
while left < right
|
|
partition
|
|
if mid < k
|
|
left = mid + 1
|
|
elif mid > k
|
|
right = mid - 1
|
|
else
|
|
left = right
|
|
.
|
|
.
|
|
res = list[k]
|
|
.
|
|
d[] = [ 9 8 7 6 5 0 1 2 3 4 ]
|
|
for i = 1 to len d[]
|
|
qselect i d[] r
|
|
print r
|
|
.
|