Compilare: main.cpp: In function 'int main()': main.cpp:16:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 16 | for (int i = 1; i < s.size(); ++i) { | ~~^~~~~~~~~~ main.cpp:27:27: 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 i = n + 1; i < s.size(); ++i) { | ~~^~~~~~~~~~ main.cpp:28:23: warning: comparison of integer expressions of different signedness: '__gnu_cxx::__alloc_traits<std::allocator<int>, int>::value_type' {aka 'int'} and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 28 | if (prefix[i] == a.size()) ans.push_back(i - 2 * n);