Compilare: user.cpp: In function ‘int main()’: user.cpp:44:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(graf[i].size() > maxx) ^ user.cpp:55:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(graf[i].size() > maxx) ^ user.cpp:67:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(graf[i].size() > maxx) ^ user.cpp:73:32: warning: ‘sol2’ may be used uninitialized in this function [-Wmaybe-uninitialized] g << sol << ' ' << sol2; ^ user.cpp:49:17: warning: ‘sol’ may be used uninitialized in this function [-Wmaybe-uninitialized] g << sol; ^