Rounding

Time limit2sMemory limit128 MB

Problem

You are given an integer N. If the current value is greater than 10, round the ones digit to make it a multiple of 10. If the result is greater than 100, round the tens digit to make it a multiple of 100. Continue in the same way: whenever the current value is greater than the next threshold, round the digit immediately below that threshold.

When rounding a digit, values 5 or greater round up, and values 4 or less round down. Print the value after no more rounding steps are required.

Input

The first line contains an integer N.

0 <= N <= 99,999,999

Output

Print the value after applying the full rounding process.