Compilare: main.cpp: In function 'bool check(int)': main.cpp:24:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 24 | while (i < aux.size()) { | ~~^~~~~~~~~~~~ main.cpp:41:33: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 41 | for (int i = 2 * x - 1 + t; i < aux.size() - x; i++) { | ~~^~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:57:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 57 | while (i < s.size()) { | ~~^~~~~~~~~~ main.cpp:76:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 76 | if (x <= s.size() / 2) | ~~^~~~~~~~~~~~~~~