public static long LargestProductInASeries(string n, int m)
{
long maxmult = 1;
long mult = 1;
string file = FileFunctions.readfileintostring("Problem8");
int[] filenums = FileFunctions.stringtointarray(file);
for (int i = 0; i < filenums.Length - m; i++)
{
mult = 1;
for (int j = i; j < i + m; j++)
{
mult *= filenums[j];
}
if (mult > maxmult)
{
maxmult = mult;
}
}
return(maxmult);
}
public static int SumOfDigits(BigInteger n)
{
int[] nums = FileFunctions.stringtointarray(n.ToString());
return(nums.Sum());
}
public static int[] DigitsFromInt(int n)
{
return(FileFunctions.stringtointarray(n.ToString()));
}