public BigIntMatrix(BigInteger[,] c1)
{
this.rowsCount = c1.GetLongLength(0);
this.colsCount = c1.GetLongLength(1);
Mat = new BigInteger[rowsCount, colsCount];
for (long i = 0; i < rowsCount; i++)
{
for (long j = 0; j < colsCount; j++)
{
Mat[i, j] = c1[i, j];
}
}
}