Compilare: main.cpp: In member function 'void Trie::Insert(std::string, int, int)': main.cpp:19:16: 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(pos < str.size()) | ~~~~^~~~~~~~~~~~ main.cpp:24:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 24 | if(pos == str.size() - 1) | ~~~~^~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:65:26: warning: comparison of integer expressions of different signedness: 'int' and 'long unsigned int' [-Wsign-compare] 65 | for(int j = 1; j <= 20 - (b.empty() ? 0 : b.size()); ++j) | ~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:78:39: warning: 'r' may be used uninitialized [-Wmaybe-uninitialized] 78 | fout << ans << " " << l << " " << r; | ^ main.cpp:44:13: note: 'r' was declared here 44 | int l , r; | ^ main.cpp:78:32: warning: 'l' may be used uninitialized [-Wmaybe-uninitialized] 78 | fout << ans << " " << l << " " << r; | ^~~ main.cpp:44:9: note: 'l' was declared here 44 | int l , r; | ^