Compilare: main.cpp: In function 'void getpi(std::string)': main.cpp:26:18: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 26 | for(int i=1;i<s.size();i++) | ~^~~~~~~~~ main.cpp: In function 'void solve()': main.cpp:46:18: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 46 | for(int i=0;i<t.size();i++) | ~^~~~~~~~~ main.cpp:47:17: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 47 | if(pi[i]==s.size()) | ~~~~~^~~~~~~~~~