Compilare: user.cpp: In function ‘void Read()’: user.cpp:58:8: warning: unused variable ‘index’ [-Wunused-variable] int index = 0; ^~~~~ user.cpp: In function ‘void Test2()’: user.cpp:81:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int j = 0; j < Ad[i].size(); ++j ) ~~^~~~~~~~~~~~~~ user.cpp: In function ‘void Euler(int)’: user.cpp:167:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < Ad[w].size(); ++i ) ~~^~~~~~~~~~~~~~ user.cpp: In function ‘void Do1()’: user.cpp:153:36: warning: ‘c_min’ may be used uninitialized in this function [-Wmaybe-uninitialized] fout << l_min << ' ' << c_min << ' ' << dist_min - 1 << '\n'; ^~~ user.cpp:153:20: warning: ‘l_min’ may be used uninitialized in this function [-Wmaybe-uninitialized] fout << l_min << ' ' << c_min << ' ' << dist_min - 1 << '\n'; ^~~