Compilare: user.cpp:2:10: warning: invalid suffix on literal; C++11 requires a space between literal and identifier [-Wliteral-suffix] #include <algorithm>open ^ user.cpp:2:21: warning: extra tokens at end of #include directive [enabled by default] #include <algorithm>open ^ user.cpp: In function ‘int main()’: user.cpp:35:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( ;i<a.size() && a[i].ft>=n; i++) ^