Compilare: main.cpp: In function 'void vizitare(int)': main.cpp:22:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[a].size();i++) ~^~~~~~~~~~~~ main.cpp: In function 'void afisare_componente(int, int)': main.cpp:37:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<w[a].size();i++) ~^~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:86:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<afisare[i].size();j++) ~^~~~~~~~~~~~~~~~~~