Compilare: main.cpp: In function 'void Aproape(std::__cxx11::string)': main.cpp:36:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < n.size(); i++) { ~~^~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:84:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < n.size(); i++) { ~~^~~~~~~~~~ main.cpp:62:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("aproape.in", "r", stdin); ^ main.cpp:63:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("aproape.out", "w", stdout); ^