Eroare de compilare: user.cpp: In function ‘void largestPalindrome(std::string)’: user.cpp:13:29: error: cannot pass objects of non-trivially-copyable type ‘std::string {aka class std::basic_string<char>}’ through ‘...’ printf ("%s\n", s); ^ user.cpp:13:29: warning: format ‘%s’ expects argument of type ‘char*’, but argument 2 has type ‘std::string {aka std::basic_string<char>}’ [-Wformat=] user.cpp:18:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < s.size(); i++) { ^ user.cpp: In function ‘int main()’: user.cpp:51:20: warning: format ‘%s’ expects argument of type ‘char*’, but argument 2 has type ‘char (*)[200001]’ [-Wformat=] scanf ("%s", &a); ^