/in/foo.cc: In member function 'void Dijkstra::showProcess()':
/in/foo.cc:112:8: warning: unused variable 'node' [-Wunused-variable]
    int node = stack.top();
        ^~~~
/in/foo.cc: In member function 'void Dijkstra::showMinPolicy()':
/in/foo.cc:159:4: warning: label 'std' defined but not used [-Wunused-label]
    std:cin >> i;
    ^~~