Compilare: main.cpp: In function 'int main()': main.cpp:38:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j=0; j<frecv[i].v.size(); j++){ ~^~~~~~~~~~~~~~~~~~ main.cpp:69:29: warning: 'insf' may be used uninitialized in this function [-Wmaybe-uninitialized] cout<<nr<<"\n"<<insf; ^