Compilare: user.cpp: In function ‘bool desc(std::pair<std::vector<int, std::allocator<int> >, std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::pair<std::vector<int, std::allocator<int> >, std::basic_string<char, std::char_traits<char>, std::allocator<char> > >)’: user.cpp:32: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘int main()’: user.cpp:69: warning: comparison between signed and unsigned integer expressions user.cpp:99: warning: comparison between signed and unsigned integer expressions user.cpp:108: warning: comparison between signed and unsigned integer expressions user.cpp:119: warning: comparison between signed and unsigned integer expressions user.cpp:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result