nb=bin(n)[2:]
nb=nb.split('0')
m=0    
for i in nb:
    if len(i)>m:
        m=len(i)
print(m)
        
				
				
				
				
				
				ANOTHER CODE
				
				
				
n=int(input())
nb=bin(n)[2:]
c,m=0,0
for i in range(len(nb)):
    if nb[i]=='1':
        c+=1
        if c>m:
            m=c
    else:
        c=0
print(m)