Compilare: user.cpp: In function ‘int conex()’: user.cpp:70:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( i = 0 ; i < M[x].size() ; i++) ^ user.cpp: In function ‘void rezolvare()’: user.cpp:98:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( j = 0 ; j < M[y].size(); j++) ^ user.cpp: In function ‘void afisare()’: user.cpp:116:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( i = 0 ; i < ciclu.size() - 1 ; i++ ) ^