int main()
{
	int n;
	int result;
	result = 0;
	scanf("%d",&n);
	while((n < 100) && (n > 0)){
		if((n % 7 == 0) || (n == 7) || (n == 17) || (n == 27) || (n == 37) || (n == 47) || (n == 57) || (n == 67) || (n == 77) || (n == 87) || (n == 97) || (n == 70)||(n == 71)||(n == 72)||(n == 73)||(n == 74)||(n == 75)||(n == 76)||(n == 77)||(n == 78)||(n == 79)){
			n = n - 1;
		}
		else{
			result = result + n * n;
				n = n - 1;
		}
	}
			printf("%d",result);
			return 0;
}
