N = int(input())
player = 1
kaisu =1
for i in range(1,N*2):
    nishin = list(bin(player))
    del nishin[0:2]
    nN=nishin.count("1")
    if nN<=N-player:
        player+=nN
        kaisu+=1
        if N==player:
            print(kaisu)
            break
    else:
        player-=nN
        kaisu +=1
if N!=player:
    print(-1)