#! /usr/bin/env python
import argparse
import math

parser = argparse.ArgumentParser(description='Chunk a list of files')

parser.add_argument('total_chunks', metavar='<total-chunks>', type=float,
                   help='total number of chunks')

parser.add_argument('this_chunk', metavar='<nth-chunk>', type=float,
                   help='Nth chunk to run')

parser.add_argument('files', metavar='files', type=str,
                   nargs='+', help='files to sort and chunk')

args = parser.parse_args()

def main(args):
    if len(args.files) < args.total_chunks:
        print(' '.join(args.files))
        return

    chunk_length = int(math.ceil(len(args.files) / args.total_chunks))
    chunk = int((args.this_chunk - 1) * chunk_length)

    print(' '.join(args.files[chunk:chunk + chunk_length]))

main(args)