def count(a,b,c):
    return a*(a-1)//2+a*b+b*c

def solve(K):
    M=250
    for a in range(M+1):
        for b in range(M-a+1):
            for c in range(M-(a+b)+1):
                if count(a,b,c)==K:
                    return [1]*a+[2]*b+[3]*c

if __name__=="__main__":
    K=int(input())
    L=solve(K)

    print(len(L))
    print(*L)