Payment

We will buy a product for N yen (the currency of Japan) at a shop.

If we use only 1000-yen bills to pay the price, how much change will we receive?

Assume we use the minimum number of bills required.

Constraints

• 1 \leq N \leq 10000
• N is an integer.

Input

Input is given from Standard Input in the following format:

N

Output

Print the amount of change as an integer.

Examples

Input

1900

Output

100

Input

3000

Output

0

inputFormat

Input

Input is given from Standard Input in the following format:

N

outputFormat

Output

Print the amount of change as an integer.

Examples

Input

1900

Output

100

Input

3000

Output

0

样例

3000

0