Compilare: main.cpp: In function 'void build_Trie(node*, std::vector<std::__cxx11::basic_string<char> >&, size_t&)': main.cpp:39:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::__cxx11::basic_string<char> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 39 | for(int i = 0; i < patterns.size() ;i++){ // iterating over patterns | ~~^~~~~~~~~~~~~~~~~ main.cpp: In function 'void fill_data(Node*, size_t&)': main.cpp:126:22: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare] 126 | for(int i = 0; i < size; ++i){ | ~~^~~~~~ main.cpp: In instantiation of 'void search_pattern(Node*, std::string&, auto:11&) [with auto:11 = std::vector<std::vector<int> >; std::string = std::__cxx11::basic_string<char>]': main.cpp:198:19: required from here main.cpp:137:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 137 | for(int i = 0; i < text.length() ;i++){ | ~~^~~~~~~~~~~~~~~