Compilare: main.cpp: In function 'int main()': main.cpp:23:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=1;i<v.size();i++) ~^~~~~~~~~ main.cpp:43:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<a.size();i++) fout<<a[i]<<" "; ~^~~~~~~~~