Compilare: user.cpp: In function ‘void GraphCreate()’: user.cpp:100:9: warning: unused variable ‘first’ [-Wunused-variable] int first = 0; ^ user.cpp: In function ‘int main()’: user.cpp:182:25: warning: ‘b’ may be used uninitialized in this function [-Wmaybe-uninitialized] fout << a << " " << b << " " << MINN; ^ user.cpp:182:13: warning: ‘a’ may be used uninitialized in this function [-Wmaybe-uninitialized] fout << a << " " << b << " " << MINN; ^