Compilare: main.cpp: In function 'int32_t main()': main.cpp:46:20: 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 (j=1; j<=s.size(); j++) | ~^~~~~~~~~~ main.cpp:50:20: 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] 50 | for (j=0; j<s.size(); j++) | ~^~~~~~~~~ main.cpp:53:20: 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] 53 | for (j=1; j<=s.size(); j++) | ~^~~~~~~~~~ main.cpp:56:24: 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] 56 | for (k=j; k<=s.size(); k++) | ~^~~~~~~~~~ main.cpp:65:24: 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] 65 | for (j=1; j<=s.size(); j++) | ~^~~~~~~~~~ main.cpp:101:20: 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] 101 | for (i=0; i<s.size(); i++) | ~^~~~~~~~~ main.cpp:104:20: 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 (i=1; i<=s.size(); i++) | ~^~~~~~~~~~ main.cpp:108:24: 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] 108 | for (j=i; j<=s.size(); j++) | ~^~~~~~~~~~