Compilare: main.cpp: In function 'void zfunction()': main.cpp:16:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 16 | for(int i=1;i<s.size();i++) | ~^~~~~~~~~ main.cpp:21:21: 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(i+z[i]<s.size()&&s[z[i]]==s[i+z[i]]) | ~~~~~~^~~~~~~~~ main.cpp:14:9: warning: variable 'l' set but not used [-Wunused-but-set-variable] 14 | int l=0; | ^ main.cpp: In function 'int main()': main.cpp:35:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 35 | for(int start=0;start<a.size();start++) | ~~~~~^~~~~~~~~ main.cpp:38:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 38 | for(int i=start;i<a.size();i++) | ~^~~~~~~~~ main.cpp:42:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 42 | for(int i=1;i<=aux.size();i++) | ~^~~~~~~~~~~~ main.cpp:44:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 44 | for(int i=aux.size();i<s.size();i++) | ~^~~~~~~~~ main.cpp:50:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 50 | for(int lg=1;lg<=aux.size();lg++) | ~~^~~~~~~~~~~~