Maximize Sum of Digits
题目描述
B. Maximize Sum of Digits
time limit per test
1 secondmemory limit per test
256 megabytesinput
standard inputoutput
standard outputAnton has the integer x. He is interested what positive integer, which doesn't exceed x, has the maximum sum of digits.
Your task is to help Anton and to find the integer that interests him. If there are several such integers, determine the biggest of them.
Input
The first line contains the positive integer x (1≤x≤1018) − the integer which Anton has.
Output
Print the positive integer which doesn't exceed x and has the maximum sum of digits. If there are several such integers, print the biggest of them. Printed integer must not contain leading zeros.
Examples
Input
100
Output
99
Input
48
Output
48
Input
521
Output
499
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