Compilare: main.cpp: In function 'bool cmp(std::__cxx11::string, std::__cxx11::string)': main.cpp:16:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < a.size (); i++) ~~^~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:33:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < alpha.size (); i++) ~~^~~~~~~~~~~~~~~ main.cpp:23:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen ("zimeria.in", "r", stdin); ^ main.cpp:24:41: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen ("zimeria.out", "w", stdout); ^