Compilare: main.cpp: In function 'int main()': main.cpp:35:25: 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 i=a.size();i<b.size();i++) | ~^~~~~~~~~ main.cpp:36:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 36 | if(z[i]==a.size()) | ~~~~^~~~~~~~~~ main.cpp:40:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 40 | for(int i=a.size();i<b.size()&&cnt<1000;i++) | ~^~~~~~~~~ main.cpp:41:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 41 | if(z[i]==a.size()) | ~~~~^~~~~~~~~~