#include <cmath>
#include <vector>
#include <unordered_map>
// #include <petscksp.h>

class localMtx
{
public:
  localMtx(/* args */){}
  int MatrixNN();
  int CountNoneZeroElements();
  int CountLowerTriangularNoneZeroElements();
  int CountDiagonalNoneZeroElement();
  bool CountEachRowNoneZeroElements();
  bool Variance(const double&, const int&);
  double ExceptDiagonalMaxElementValue();
  double DiagonalMaxElementValue();
  bool DiagonalDominantRatio();
  bool RowVariability();
  void Solve(const int, const int, int*, const char *); 

  std::unordered_map<int, int> none_zero_num;

  std::vector<int> recev_row_index;
  std::vector<int> recev_col_index;
  std::vector<double> recev_val_index;
  std::vector<double> recev_rhs_index;

  int localSize;// 2. 三元组行数/非零元素数
  int localMatrixNN;   // 1. 行数
  int localLowerTriangularNoneZero;  // 4. 下三角部分非零元素数
  int localDiagonalNoneZero;//   6. 对角线非零元素数
  double localSumNoneZeroValue; // 7. 行非零元素总和
  int localMaxNoneZeroEachRow; // 8.
  double localExceptDiagonalMaxValue;// 10. 最大元素值
  double localDiagonalMaxValue;// 11. 对角线最大元素值
  double localVariance;//9. 方差
  int localDiagonalDominant;// 12.对角占优
  double localRowVariability;
  char * ksp;
  char * pc;
  char * ksp_parameters;
  char * pc_parameters;
  double elapsed_time;
};