Compilare: user.cpp: In function ‘void makealias()’: user.cpp:51:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < g[from].size(); i++){ ^ user.cpp: In function ‘void dca()’: user.cpp:97:9: warning: unused variable ‘x1’ [-Wunused-variable] int x1, y1, ind; ^ user.cpp:97:13: warning: unused variable ‘y1’ [-Wunused-variable] int x1, y1, ind; ^ user.cpp: In function ‘void elim(int)’: user.cpp:134:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < g[from].size(); i++){ ^