Compilare: main.cpp: In function 'void init()': main.cpp:17:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 17 | for(int i=0,j=0;i<s.size() && j<s.size();i++,j++){ | ~^~~~~~~~~ main.cpp:17:44: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 17 | for(int i=0,j=0;i<s.size() && j<s.size();i++,j++){ | ~^~~~~~~~~ main.cpp:18:53: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 18 | if(s[i]==t[j] && s[i]==t[j+1] && j+1<t.size()){ | ~~~^~~~~~~~~