import java.math.BigDecimal;
import java.math.RoundingMode;
import java.util.Scanner;
import java.util.regex.Pattern;
public final class Main {
public static void main
(final String[] argv
) { final Scanner input
= new Scanner
(System.
in); while (input.hasNextBigDecimal()) {
System.
out.
println(input.
nextBigDecimal().
setScale(2, RoundingMode.
HALF_UP)); }
}
}
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