Compilare: user.cpp:2:17: warning: missing terminating ' character [enabled by default] #include<vector>' ^ user.cpp:2:17: warning: extra tokens at end of #include directive [enabled by default] user.cpp: In function ‘int re(int)’: user.cpp:17:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<v[x].size();j++) ^ user.cpp:25:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<v[x].size();j++) ^