Compilare: main.cpp: In function 'int main()': main.cpp:11:21: 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 st=0; st<s.size()-1; st++) //st | ~~^~~~~~~~~~~ main.cpp:13:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 13 | for(int st1=st+1; st1<s.size(); st1++) //st1 | ~~~^~~~~~~~~ main.cpp:15:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 15 | for(int ind=0; ind+st1<=s.size(); ind++) | ~~~~~~~^~~~~~~~~~