Compilare: main.cpp: In function 'int main()': main.cpp:26:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 26 | for (int i = 0; i < s.size() - 1; ++i) { | ~~^~~~~~~~~~~~~~ main.cpp:30:47: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 30 | while (left_idx >= 0 && right_idx < s.size() && is_correct(s[left_idx], s[right_idx])) { | ~~~~~~~~~~^~~~~~~~~~ main.cpp:50:36: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 50 | while (l >= 0 && r < s.size() && is_correct(s[left_substring_pos], s[right_idx])) { | ~~^~~~~~~~~~ main.cpp:25:25: warning: 'left_substring_pos' may be used uninitialized [-Wmaybe-uninitialized] 25 | int current_length, left_substring_pos, right_substring_pos = -1, last_substring_length = 0, max_substring_length = 0; | ^~~~~~~~~~~~~~~~~~