simpleoutput

import stdio
import sys
import stdarray
import random

# Accept integers m and n as command-line arguments. Write to standard
# output a random sample of m integers in the range 0...n-1 (no
# duplicates).

m = int(sys.argv[1]) # choose this many elements
n = int(sys.argv[2]) # from 0, 1, ..., n-1

# Initialize perm.
perm = stdarray.create1D(n, 0)
for i in range(n):
    perm[i] = i

# Create random sample in perm[0], perm[1], ..., perm[m-1]
for i in range(m):

    # Choose a random integer r between i and n-1.
    r = random.randrange(i, n)

    # Swap perm[i] and perm[r].
    temp = perm[r]
    perm[r] = perm[i]
    perm[i] = temp

# Write the results.
for i in range(m):
    stdio.write(str(perm[i]) + ' ')
stdio.writeln()