import sys
input = lambda :sys.stdin.readline()[:-1]
ni = lambda :int(input())
na = lambda :list(map(int,input().split()))
yes = lambda :print("yes");Yes = lambda :print("Yes");YES = lambda : print("YES")
no = lambda :print("no");No = lambda :print("No");NO = lambda : print("NO")
######################################################################

def F(x, a, n):
    for i in a:
        x = ((x <<i ) + 1) % (1 << n)
    return x

n, x, y = na()

if y % 2 == 0:
    print(-1)
    exit()

f = []
for i in range(64):
    if y >> i & 1:
        f.append(i)

ans = [n]

for i in range(len(f)-2, -1, -1):
    ans.append(f[i+1] - f[i])

print(len(ans))
print(*ans)
#print(F(x, ans, n))