import sys
def I(): return int(sys.stdin.readline().rstrip())


D = I()
l = D.bit_length()

ans = D
a = 2
for i in range(1,l):
    x = (a*D+2*a-2)//(2*a-1)
    y = (a*(D+i)-1)//(2*a-1)
    for j in range(x,y+1):
        if sum(j//(2**k) for k in range(i+1)) == D:
            ans = min(ans,j)
    a *= 2

print(ans)