/in/driver/main.cpp: In function 'int main()':
/in/driver/main.cpp:6:2: error: 'ShortestP2P' was not declared in this scope
  ShortestP2P a;
  ^~~~~~~~~~~
/in/driver/main.cpp:7:2: error: 'a' was not declared in this scope
  a.readGraph();
  ^