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:19:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 19 | if(j+1<t.size() && s[i]==t[j] && s[i]==t[j+1]){ | ~~~^~~~~~~~~