import java.util.Scanner;
import static java.lang.System.in;

public class Demo {
    public static void main(String[] args) {
        Scanner console = new Scanner(in);
        int numOne = Integer.parseInt(console.nextLine());
        int numTwo = Integer.parseInt(console.nextLine());
        int magicNum = Integer.parseInt(console.nextLine());
        int combination = 0;
        boolean isFalse = false;
        for(int i = numOne; i >= numTwo; i--) {
            for (int j = numOne; j > numTwo; j--) {
                combination++;
                if (i + j == magic && !isFalse) {
                    isFalse = true;
                    System.out.printf("Combination N:%d (%d + %d = %d)",counter,i,j,magicNum);
                }
            }
        }
        if(IsFalse == false) {
            System.out.printf("%d combinations - neither equals %d", combination, magicNum);
        }
    }
}