import java.util.Scanner;

public class Exam1_Problem6_SumOfTwoNumbers {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        int a = Integer.parseInt(scanner.nextLine());
        int b = Integer.parseInt(scanner.nextLine());
        int magicNumber = Integer.parseInt(scanner.nextLine());
        int counter = 0;

        for (int i = a; i <= b; i++) {
            for (int j = a; j <= b; j++) {
                counter++;
                if (i + j == magicNumber){
                    System.out.printf("Combination N:%d (%d + %d = %d)", counter, i, j, magicNumber);
                    return;
                }
            }
        }
        System.out.printf("%d combinations - neither equals %d", counter, magicNumber);
    }
}