text: #ifndef GRAPH_CHECK_HPP
  #define GRAPH_CHECK_HPP
  
  #include <stdio.h>
  
  template<typename vtype, typename itype>
  bool check_symmetric(vtype* ei, vtype* ej, itype m, vtype n);
  
  template<typename vtype, typename itype>
  bool check_repeated(vtype* ei, vtype* ej, itype m, vtype n);
  
  template<typename vtype, typename itype>
  bool check_diagonal(vtype* ei, vtype* ej, itype m);
  
  #include "../graph_check.cpp"
  
  #endif
  