/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	interface IntComparator { boolean compare(int left, int right); }
 
	public static void main (String[] args) throws java.lang.Exception
	{
		Map<String, IntComparator> comparisons = new HashMap<>();
		comparisons.put("=", (l, r) -> { return l == r; });
		comparisons.put("<", (l, r) -> { return l < r; });
		System.out.println(comparisons.get("=").compare(1, 2));
		System.out.println(comparisons.get("<").compare(1, 2));
	}
}

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