import java.util.Scanner;

public class TriangleDetector {

	public static void main(String[] args) {

		System.out.print("Enter Edge 1: ");
		Scanner input = new Scanner(System.in);
		int e1 = input.nextInt();

		System.out.print("Enter Edge 2: ");
		int e2 = input.nextInt();

		System.out.print("Enter Edge 3: ");
		int e3 = input.nextInt();

		if (e1+e2 <= e3) {
			System.out.print("This is not a valid triangle. "+e1+ "+" +e2+ "="+(e1+e2)+" and not greater than "+e3);
		}else if (e1+e3 <= e2) {
			System.out.print("This is not a valid triangle. "+e1+ "+" +e3+ "="+(e1+e3)+" and not greater than "+e2);
		}else if (e2+e3 <= e1) {
			System.out.print("This is not a valid triangle. "+e2+ "+" +e3+ "="+(e2+e3)+" and not greater than "+e1);
		}else{
			System.out.print("This is a valid triangle.");
		}

	}

}