Compilare: main.cpp: In function 'int main()': main.cpp:13:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 13 | for(int i=1;i<s.size();++i) | ~^~~~~~~~~ main.cpp:16:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 16 | while(i+z[i]<s.size() and s[z[i]]==s[i+z[i]]) | ~~~~~~^~~~~~~~~ main.cpp:19:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 19 | for(int i=a.size()+1;i<s.size();++i) | ~^~~~~~~~~ main.cpp:20:12: 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] 20 | if(z[i]==a.size()) v.push_back(i-a.size()-1);