Compilare: main.cpp: In function 'void adaug(int, int)': main.cpp:18:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[r].size();i++) ~^~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:46:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<v[i].size();i++) ~^~~~~~~~~~~~