Compilare: user.cpp: In function ‘void calc(int, fiu&)’: user.cpp:31:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<fii[k].size();i++) ^ user.cpp:37:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<fii[k].size();i++) ^ user.cpp: In function ‘void parg(int, int)’: user.cpp:47:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<fii[k].size();i++) ^