Compilare: main.cpp: In function 'void calc()': main.cpp:14:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 14 | for (int i = 2; i <= s.size(); i++) { | ~~^~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:25:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 25 | for (int i = 1; i <= s.size(); i++) | ~~^~~~~~~~~~~ main.cpp:26:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 26 | if (kmp[i] == c.size()) v.push_back(i - 2 * c.size() - 1); | ~~~~~~~^~~~~~~~~~~