Compilare: user.cpp: In function ‘void Input()’: user.cpp:41:22: warning: integer overflow in expression [-Woverflow] int f = ((1<<31)-1); ^ user.cpp: In function ‘void Prim()’: user.cpp:50:15: warning: unused variable ‘cost’ [-Wunused-variable] int node, cost; ^ user.cpp: In function ‘void Output()’: user.cpp:78:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( int i = 0; i < Edge.size(); ++i ) ^