#!/usr/bin/env python3
import sys

n = int(sys.argv[1])
peak_pos = int(sys.argv[2])
zeros = int(sys.argv[3])

a = [0]*n
a[peak_pos] = n+1
for i in range(zeros+1, n, zeros+1):
    if peak_pos+i < n:
        a[peak_pos+i] = 1
    if peak_pos-i >= 0:
        a[peak_pos-i] = 1

print(len(a))
print(' '.join(map(str, a)))