using System;

public class Program

{

    public static void Main()

    {

        int result = (-1);

        While (Low <= High) And (int result = (-1));

        Middle = (Low + High) Div 2;// find middle of list

        If ElementSought = Vector[Middle] THEN;

        int result = Middle // Found

            ELSE

            IF ElementSought < Vector [Middle] THEN;

        High = Middle - 1; // search lower half

        ELSE

            IF ElementSought > Vector[Middle] THEN;

        Low = Middle + 1; //search upper half

        ENDIF

            ENDIF

ENDIF

            ENDWHILE;

    }

}