public static string LargeSum(string n)
{
string[] nums = FileFunctions.readfileintostringarr(n);
List <BigInteger> bigs = FileFunctions.stringarrtobigint(nums);
return(bigs.Aggregate(BigInteger.Add).ToString());
}
public static int MaximumPathSum1(string n)
{
string[] temp = FileFunctions.readfileintostringarr(n);
int[][] tri = FileFunctions.stringtointarraySplit2d(temp, ' ');
for (int j = tri.GetLength(0) - 2; j >= 0; j--)
{
for (int i = 0; i < tri[j].Length; i++)
{
tri[j][i] += Math.Max(tri[j + 1][i], tri[j + 1][i + 1]);
}
}
return(tri[0][0]);
}
public static int LargestProductInAGrid(string n, int m)
{
int mult = 1;
string[] strnums = FileFunctions.readfileintostringarr(n);
int[][] nums = FileFunctions.stringtointarraySplit2d(strnums, ' ');
for (int i = 0; i < nums.Count(); i++)
{
for (int j = 0; j < nums[0].Count(); j++)
{
if (i < nums.Count() - m)
{
int tempmult = 1;
for (int k = 0; k < m; k++)
{
tempmult *= nums[i + k][j];
}
if (tempmult > mult)
{
mult = tempmult;
}
}
if (j < nums.Count() - m)
{
int tempmult = 1;
for (int k = 0; k < m; k++)
{
tempmult *= nums[i][j + k];
}
if (tempmult > mult)
{
mult = tempmult;
}
}
if (j < nums.Count() - m && i < nums.Count() - m)
{
int tempmult = 1;
for (int k = 0; k < m; k++)
{
tempmult *= nums[i + k][j + k];
}
if (tempmult > mult)
{
mult = tempmult;
}
}
if (j > m && i < nums.Count() - m)
{
int tempmult = 1;
for (int k = 0; k < m; k++)
{
tempmult *= nums[i + k][j - k];
}
if (tempmult > mult)
{
mult = tempmult;
}
}
}
}
return(mult);
}