Compilare: main.cpp: In function 'int main()': main.cpp:23:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 23 | for (i = 1; i < s.size(); i++) | ~~^~~~~~~~~~ main.cpp:27:40: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 27 | for (int j = i, ind = 0; j < s.size() and s[j] == s[ind]; j++, ind++) | ~~^~~~~~~~~~ main.cpp:44:44: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 44 | for (int j = i, ind = 0; j < s.size() and s[j] == s[ind]; j++, ind++) | ~~^~~~~~~~~~ main.cpp:54:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 54 | for (i = 1; i < s.size(); i++) | ~~^~~~~~~~~~ main.cpp:55:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 55 | if (z[i] >= a.size()) | ~~~~~^~~~~~~~~~~