import java.util.Scanner;

public class Main {

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

        int startNumber = Integer.parseInt(scanner.nextLine());
        int endNumber = Integer.parseInt(scanner.nextLine());
        int magicNumber = Integer.parseInt(scanner.nextLine());
        int combination = 0;


        for (int i = startNumber; i <= endNumber; i++) {
            for (int j = startNumber; j <= endNumber; j++) {
                combination++;

                if (i + j == magicNumber) {
                    System.out.printf("Combination N:%d (%d + %d = %d)", combination, i, j, magicNumber);
                    return;
                }
            }
        }
        System.out.printf("%d combinations - neither equals %d", combination, magicNumber);

    }
}