Compilare: main.cpp: In function 'int main()': main.cpp:19:21: warning: comparison of integer expressions of different signedness: 'si' {aka 'short int'} and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 19 | for(si i=0;i<=s.size();++i) | ~^~~~~~~~~~ main.cpp:26:25: warning: comparison of integer expressions of different signedness: 'si' {aka 'short int'} and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 26 | for(si i=1;i<nz.size();++i) | ~^~~~~~~~~~ main.cpp:29:29: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 29 | while(i+z[i]<nz.size() and nz[i+z[i]]==nz[z[i]]) | ~~~~~~^~~~~~~~~~ main.cpp:35:21: warning: comparison of integer expressions of different signedness: 'si' {aka 'short int'} and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 35 | if(i>d.size() and z[i]==d.size()) | ~^~~~~~~~~ main.cpp:35:39: warning: comparison of integer expressions of different signedness: 'si' {aka 'short int'} and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 35 | if(i>d.size() and z[i]==d.size()) | ~~~~^~~~~~~~~~ main.cpp:39:21: warning: comparison of integer expressions of different signedness: 'si' {aka 'short int'} and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 39 | for(si i=0;i<s.size();++i) | ~^~~~~~~~~