Compilare: main.cpp: In member function 'void trie::insert(const std::string&, ll)': main.cpp:22:26: warning: operation on 'p' may be undefined [-Wsequence-point] 22 | next[s[p]]->insert(s,++p); | ^~~ main.cpp: In member function 'void trie::erase(const std::string&, ll)': main.cpp:27:25: warning: operation on 'p' may be undefined [-Wsequence-point] 27 | next[s[p]]->erase(s,++p); | ^~~ main.cpp: In member function 'll trie::count(const std::string&, ll)': main.cpp:33:32: warning: operation on 'p' may be undefined [-Wsequence-point] 33 | return next[s[p]]->count(s,++p); | ^~~ main.cpp: In function 'int main()': main.cpp:39:12: warning: unused variable 'j' [-Wunused-variable] 39 | ll n,m,i,j,k,l; | ^ main.cpp:39:14: warning: unused variable 'k' [-Wunused-variable] 39 | ll n,m,i,j,k,l; | ^ main.cpp:39:16: warning: unused variable 'l' [-Wunused-variable] 39 | ll n,m,i,j,k,l; | ^