Compilare: main.cpp: In function 'int main()': main.cpp:23:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 23 | for(int poz=0;poz<str.size();poz++) | ~~~^~~~~~~~~~~ main.cpp:27:32: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 27 | if(str[poz]==' '||poz+1==str.size()) | ~~~~~^~~~~~~~~~~~ main.cpp:56:16: warning: unused variable 'first' [-Wunused-variable] 56 | ll first=l-1; | ^~~~~