Compilare: main.cpp: In function 'int Query2(char*)': main.cpp:66:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ main.cpp: In constructor 'Trie::Trie()': main.cpp:19:12: warning: iteration 27 invokes undefined behavior [-Waggressive-loop-optimizations] Next[i] = nullptr; ~~~~~~~~^~~~~~~~~ main.cpp:18:22: note: within this loop for ( int i = 0; i < 30; ++i) ~~^~~~