Compilare: user.cpp: In function ‘void cmlsc(std::vector<int>&, std::vector<int>&)’: user.cpp:20:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1; i<a.size(); i++){ ^ user.cpp: In function ‘int main()’: user.cpp:65:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<b.size(); i++)g<<a[b[i]]<<" "; ^