n = int(input())
a = []
def calc(l,r):
    if len(a) == 5:
        return
    m = 1000
    s = set()
    for i in range(l,r):
        s.add(i)
    k = len(s)
    print(m,k,flush=True)
    print(*list(s),flush=True)
    c = int(input())
    if c == 0:
        return 
    elif k == 1:
        for i in range(k):
            a.append(l)
    else:
        x = (l+r)//2
        calc(l,x)
        calc(x,r)
calc(0,1001)
print(sum(a))