Problem2144--ABC220a - Find Multiple

2144: ABC220a - Find Multiple

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Time Limit : 1.000 sec  Memory Limit : 128 MB

SubmitSolved: 6Submit Num: 14Statistics

Description

Problem Statement

Print a number between A and B (inclusive) that is a multiple of C.
If there is no such number, print -1.

Constraints

  • 1≤A≤B≤1000
  • 1≤C≤1000
  • All values in input are integers.

Input

Input is given from Standard Input in the following format: 

A B C

Output

Print the answer.
If there is no number with the desired property, print -1.

Sample Input Copy 

123 456 100

Sample Output Copy 

200 (300 or 400 would also be accepted.)

Source/Category

atcoder loop 循环 
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