ro.cpp: In function `void CLEAR()': ro.cpp:82: warning: comparison between signed and unsigned integer expressions ro.cpp:83: warning: comparison between signed and unsigned integer expressions ro.cpp: In function `void Add_to(std::vector<int, std::allocator<int> >&, std::vector<int, std::allocator<int> >)': ro.cpp:97: warning: comparison between signed and unsigned integer expressions ro.cpp: In function `std::pair<int, int> get_answer(int, std::vector<int, std::allocator<int> >, std::vector<int, std::allocator<int> >, int)': ro.cpp:106: warning: comparison between signed and unsigned integer expressions ro.cpp:109: warning: comparison between signed and unsigned integer expressions ro.cpp:112: warning: comparison between signed and unsigned integer expressions ro.cpp:123: warning: comparison between signed and unsigned integer expressions ro.cpp:103: warning: `int how' might be used uninitialized in this function ro.cpp: In function `void dp_dfs(int)': ro.cpp:196: warning: comparison between signed and unsigned integer expressions ro.cpp:209: warning: comparison between signed and unsigned integer expressions ro.cpp: In function `void last_components_refresh()': ro.cpp:237: warning: comparison between signed and unsigned integer expressions ro.cpp:238: warning: comparison between signed and unsigned integer expressions ro.cpp:241: warning: comparison between signed and unsigned integer expressions ro.cpp: In function `void Solve(int)': ro.cpp:265: warning: comparison between signed and unsigned integer expressions ro.cpp:271: warning: comparison between signed and unsigned integer expressions ro.cpp:282: warning: comparison between signed and unsigned integer expressions