Fedya and Maths
说明
B. Fedya and Maths
time limit per test
1 secondmemory limit per test
256 megabytesinput
standard inputoutput
standard outputFedya studies in a gymnasium. Fedya's maths hometask is to calculate the following expression:
for given value of n. Fedya managed to complete the task. Can you? Note that given number n can be extremely large (e.g. it can exceed any integer type of your programming language).
Input
The single line contains a single integer n (0≤n≤10105). The number doesn't contain any leading zeroes.
Output
Print the value of the expression without leading zeros.
Examples
Input
4
Output
4
Input
124356983594583453458888889
Output
0
Note
Operation xmody means taking remainder after division x by y.
Note to the first sample:
样例
