Compilare: main.cpp: In function 'int main()': main.cpp:38:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 38 | for(int i = a.size()+1; i < s.size() && cnt < 1000; ++i) { | ~~^~~~~~~~~~ main.cpp:39:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 39 | if(z[i] == a.size()) { | ~~~~~^~~~~~~~~~~ main.cpp:48:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 48 | for(int i = 0; i < ans.size(); ++i) | ~~^~~~~~~~~~~~