Compilare: main.cpp: In function 'void afisare()': main.cpp:35:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<v[i].size();j++) ~^~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:50:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<v[x-1].size();++j) ~^~~~~~~~~~~~~~ main.cpp:54:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<v[y-1].size();++j) ~^~~~~~~~~~~~~~