Compilare: main.cpp: In function 'std::vector<int> compute_pi(std::string)': main.cpp:11:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 11 | for (int i = 1; i < s.size(); i++) { | ~~^~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:31:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 31 | for (int i = 0; i < match.size(); i++) { | ~~^~~~~~~~~~~~~~ main.cpp:32:22: 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] 32 | if (match[i] == pattern.size()) { main.cpp:39:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 39 | for (int i = 0; i < match.size() && ans < 1000; i++) { | ~~^~~~~~~~~~~~~~ main.cpp:40:22: 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] 40 | if (match[i] == pattern.size()) {