/**
 *  A triangle has 3 sides.  The sum of the lengths of the two smaller
 *  sides is greater that the length of longer side.
 *
 *  Read 3 positive integers.  Each integer represents the length of a 
 *  line segment.  Determine whether of not the segments can form a 
 *  triangle.
 */

import java.util.Scanner;

public class FormsTriangleDemo {

  public static void main( String[] args ) {

    // Read the 3 segment lengths
    Scanner inp = new Scanner( System.in );
    System.out.print("Enter 3 line segment lengths: ");
    int seg1 = inp.nextInt();
    int seg2 = inp.nextInt();
    int seg3 = inp.nextInt();

    // Validate segment lengths
    if( seg1 <= 0 || seg2 <= 0 ||  seg3 <= 0 ) {
      System.out.println("Line segment lines most be greater than zero");
      System.exit(0);
    }

    // Determine the longest side and the other two sides.
    int longestSide, side2, side3;
    if( seg1 >= seg2 && seg1 >= seg3 ) {
      longestSide = seg1;
      side2 = seg2;
      side3 = seg3;
    }
    else if( seg2 >= seg1 && seg2 >= seg3 ) {
      longestSide = seg2;
      side2 = seg1;
      side3 = seg3;
    }
    else {
      longestSide = seg3;
      side2 = seg2;
      side3 = seg1;
    }

    // Determine whether or not the segments can form a triangle
    boolean segmentsFormTriangle;
    if( longestSide < side2 + side3 ) {
      segmentsFormTriangle = true;
    }
    else {
      segmentsFormTriangle = false;
    }

    // Display the answer
    System.out.print( seg1 + ", " + seg2 + " and " + seg3 );
    if( segmentsFormTriangle ) 
      System.out.print(" form a triangle.");
    else
      System.out.print(" do not form a triangle.");
    System.out.println();
  }
}