5261: ABC160——Task B： Golden Coins
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Description
Takahashi loves gold coins. He gains 1000 happiness points for each 500-yen coin he has and gains 5 happiness points for each 5-yen coin he has. (Yen is the currency of Japan.) Takahashi has X yen. If he exchanges his money so that he will gain the most happiness points, how many happiness points will he earn?
(We assume that there are six kinds of coins available: 500-yen, 100-yen, 50-yen, 10-yen, 5-yen, and 1-yen coins.)
(We assume that there are six kinds of coins available: 500-yen, 100-yen, 50-yen, 10-yen, 5-yen, and 1-yen coins.)
Input
Input is given from Standard Input in the following format:
X
Output
Print the maximum number of happiness points that can be earned.
Constraints
$0 ≤ X ≤ 10^9$
$X$ is an integer.
$X$ is an integer.
Sample 1 Input
1024
Sample 1 Output
2020
By exchanging his money so that he gets two 500-yen coins and four 5-yen coins, he gains 2020 happiness points, which is the maximum number of happiness points that can be earned.
Sample 2 Input
0
Sample 2 Output
0
Sample 3 Input
1000000000
Sample 3 Output
2000000000
He is a billionaire - in yen.