maroco.cpp: In function 'void rem(std::vector<int, std::allocator<int> >&, int)': maroco.cpp:14: warning: comparison between signed and unsigned integer expressions maroco.cpp: In function 'int main()': maroco.cpp:51: warning: comparison between signed and unsigned integer expressions maroco.cpp:31: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result maroco.cpp:32: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result