Compilare: user.cpp:180:2: warning: no newline at end of file user.cpp: In function 'int count(std::vector<std::pair<double, double>, std::allocator<std::pair<double, double> > >, int)': user.cpp:14: warning: comparison between signed and unsigned integer expressions user.cpp:20: warning: comparison between signed and unsigned integer expressions user.cpp:50: warning: comparison between signed and unsigned integer expressions