Compilare: user.cpp:74:2: warning: no newline at end of file user.cpp: In function 'void calc_prefix(std::string, std::vector<int, std::allocator<int> >&)': user.cpp:13: warning: comparison between signed and unsigned integer expressions user.cpp: In function 'void find_matches(std::string, std::string, std::vector<int, std::allocator<int> >&, std::vector<int, std::allocator<int> >&, int*)': user.cpp:27: warning: comparison between signed and unsigned integer expressions user.cpp:33: warning: comparison between signed and unsigned integer expressions user.cpp: In function 'int main()': user.cpp:60: warning: comparison between signed and unsigned integer expressions