import math
n = int(input())
if(n==1):
    print(-1);
    quit();
wp = -1;
c = m = 1;
while(1):    
    c = c + 1;
    s = str(bin(m)).count('1');
    m = m + s;
    if (m > n):
        if (wp == m):
            print(-1);
            break;
        wp = m;
        m = m - s*2;7
    elif (m == n):
        print(c);
        break;