int main()     //trng(n) and dvsr(n) find the nth triangle number and the number of divisors for n respectively
{
	long int a=1;
	long int b=0;
	while(1==1)     //if the number we're currently testing has less than 500 divisors, test the next one
	{
		b=trng(a);  //set b to the ath triangle number
		if(dvsr(b)>=500)
			break;
		a++;
	}
	printf("%ld",b);
	return 0;
}