import java.util.Scanner;


public class HelloWorld {
		public static void main (String[] args) {
			Scanner sc = new Scanner(System.in);
			int n = sc.nextInt();
			sc.close();

			int count =0;
			for (int x=0;x<=n;x++) {
				for (int y=0;y<=n;y++) {
					for(int z=0;z<=n;z++) {
						if (x+y+z == n) {
							 count ++;
						}
					}
				}
			}
			System.out.println(count);


	}
}