107. 987654321 problem

time limit per test: 0.25 sec. memory limit per test: 4096 KB

For given number N you must output amount of N-digit numbers, such, that last digits of their square is equal to 987654321.

Input

Input contains integer number N (1<=N<=10^{6})

Output

Write answer to the output.

Sample Input

8

Sample Output

0