a = []
f = open("../data/qsort_input.txt", "r")
for l in f.readlines():
if len(l) > 0:
num = int(l)
a.append(num)
import sort_utils
b = []
b.extend(a)
c = []
c.extend(a)
comps = qsort(a, 0, len(a) - 1, pickFirstElementAsPivot)
sort_utils.verify_sort(a)
print "a comparisons", comps
b[0], b[-1] = b[-1], b[0]
comps = qsort(b, 0, len(b) - 1, pickLastElementAsPivot)
sort_utils.verify_sort(b)
print "b comparisons", comps
p = pickMedianElementAsPivot(c, 0, len(c) - 1)
c[0], c[p] = c[p], c[0]
comps = qsort(c, 0, len(c) - 1, pickMedianElementAsPivot)
sort_utils.verify_sort(c)
print "c comparisons", comps
def merge_sort(arr, aux, lo, hi):
if hi > lo:
mid = lo + (hi - lo) // 2
merge_sort(arr, aux, lo, mid)
merge_sort(arr, aux, mid + 1, hi)
merge(arr, aux, lo, mid, hi)
def merge(arr, aux, lo, mid, hi):
for i in range(lo, hi+1):
aux[i] = arr[i]
pa, pb = lo, mid + 1
for i in range(lo, hi+1):
if pa > mid:
arr[i] = aux[pb]
pb += 1
elif pb > hi:
arr[i] = aux[pa]
pa += 1
elif aux[pa] > aux[pb]:
arr[i] = aux[pb]
pb += 1
else:
arr[i] = aux[pa]
pa += 1
a = sort_utils.generate_random_array(10000)
random.shuffle(a)
merge_sort_top_down(a)
sort_utils.verify_sort(a)
for i in aux:
counts[nth_digit(i, s, radix)] += 1
accum = 0
for i in range(radix):
old_count = counts[i]
counts[i] = accum
accum += old_count
for i in aux:
digit = nth_digit(i, s, radix)
ordered[counts[digit]] = i
counts[digit] += 1
aux, ordered = ordered, aux
return aux
import sort_utils
a = sort_utils.generate_random_array(1000000)
# print a
b = counting_sort(a)
# print b
sort_utils.verify_sort(b)
b = radix_sort(a)
# print b
sort_utils.verify_sort(b)