Compilare: main.cpp: In function 'void da()': main.cpp:21:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 21 | while(val<s.size() && s[val]== ',') | ~~~^~~~~~~~~ main.cpp: In function 'void folder_fis()': main.cpp:33:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 33 | while(val<s.size() && ((s[val]>='a' && s[val]<='z') || (s[val]>='0' && s[val]<='9'))) | ~~~^~~~~~~~~ main.cpp:43:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 43 | while(val<s.size() && ((s[val]>='A' && s[val]<='Z') || (s[val]>='0' && s[val]<='9'))) | ~~~^~~~~~~~~ main.cpp: In function 'int main()': main.cpp:62:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::__cxx11::basic_string<char> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 62 | for(int i=0;i<sol.size();i++) | ~^~~~~~~~~~~