/*
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 */
package javaapplication1;

/**
 *
 * @author Ahmed
 */


public class JavaApplication1 {

    /**
     * @param args the command line arguments
     */
    num sum=0;
    public static void main(String[] args) {
        // TODO code application logic here
        for(int i=2;i>=30;i++)
        {
            if(i%2==0)
            {
                sum+=i;
            }
            else {
                sum+=i+1;
            }
        }
        System.out.println("sum:" + sum);

    }
}

}