/* package whatever; // don't place package name! */
import java.util.*;
import java.lang.*;
import java.io.*;
import java.util.regex.*;
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
{
String rx
= "(\\A|[^*/])(-?\\d+(?:\\.\\d+)?)([+-])(\\d+(?:\\.\\d+)?)(\\Z|[^*/])"; Pattern patternPairOfAddOrSub = Pattern.compile(rx);
Matcher matcher = patternPairOfAddOrSub.matcher("2+4+5");
System.
out.
println(matcher.
find()); }
}
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