prepare (1/3): 
finished

make (2/3): 
g++ -O3 -Wall -std=c++11  -o main.o -c main.cpp 
main.cpp: In constructor 'node::node()':
main.cpp:20:9: warning: 'node::D' will be initialized after [-Wreorder]
     int D; // D value for MST
         ^
main.cpp:18:10: warning:   'bool node::ifvisited' [-Wreorder]
     bool ifvisited;// unused variable
          ^~~~~~~~~
main.cpp:14:5: warning:   when initialized here [-Wreorder]
     node():inOrder(0),D(-1),ifvisited(false){};
     ^~~~
g++ -O3 -Wall -std=c++11  -o main main.o
finished

clean (3/3): 
finished

all task finished, build successfully