Compilare: main.cpp: In function 'void init()': main.cpp:18:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 18 | while(i<s.size() && j<t.size()){ | ~^~~~~~~~~ main.cpp:18:34: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 18 | while(i<s.size() && j<t.size()){ | ~^~~~~~~~~ main.cpp:21:28: 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(k<t.size() && t[k]==t[j]){ | ~^~~~~~~~~