N = int(input())
if N == 0:
print(N)
else:
m = abs(N)
lst=[]
while m != 0:
lst.append(m%10)
m = m//10
count = len(lst)
result = 0
for k in range(len(lst)):
result = result + lst[k]*pow(10,count-1)
count = count-1
if N <0:
print(-result)
else:
print(result)
