Compilare: main.cpp: In function 'int main()': main.cpp:32:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(g[ i ].size() < mix){ ~~~~~~~~~~~~~~^~~~~ main.cpp:44:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(g[ it ].size() < mix + 2 && viz[ it ] == 0){ ~~~~~~~~~~~~~~~^~~~~~~~~ main.cpp:51:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] }while(g[ st ].size() != mix); ~~~~~~~~~~~~~~~^~~~~~