Compilare: main.cpp: In function 'int main()': main.cpp:31:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(pz[i]<v[i].size() && fv[v[i][pz[i]]]==9999) ~~~~~^~~~~~~~~~~~ main.cpp:35:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(pz[i]<v[i].size()) ~~~~~^~~~~~~~~~~~