Compilare: main.cpp: In function 'int main()': main.cpp:37:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 37 | for(int i=0;i<pattern.size();) | ~^~~~~~~~~~~~~~~ main.cpp:39:51: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 39 | if(!ok) {ok=1;while(pattern[i]!='#'&&i<pattern.size()) i++;} | ~^~~~~~~~~~~~~~~