Compilare: main.cpp: In function 'void recurs(long long int, long long int)': main.cpp:25:26: 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] 25 | while(poz<s.size()) | ~~~^~~~~~~~~ main.cpp:51:22: 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] 51 | while(poz<s.size()) | ~~~^~~~~~~~~ main.cpp: In function 'int main()': main.cpp:97:12: 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] 97 | while(i<=s.size()) | ~^~~~~~~~~~ main.cpp:104:21: 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] 104 | for(j=i+1; j<s.size(); j++) | ~^~~~~~~~~