a=int(input())
k=a
b=''
counter=0
while a>0:
    b=str(a%2)+b
    a=a//2
while len(b)<8:
    b='0'+b
num=[]
c=''
for i in range(8):
    num.append(1-int(b[i]))
    c=c+str(num[i])
c=int(c,2)
raznost=c-k
print(raznost)