Compilare: main.cpp: In function 'void Add(Trie*&, char*, int)': main.cpp:40:21: warning: array subscript has type 'char' [-Wchar-subscripts] if(!Nod -> Son[c]) ^ main.cpp:41:21: warning: array subscript has type 'char' [-Wchar-subscripts] Nod -> Son[c] = new Trie; ^ main.cpp:43:21: warning: array subscript has type 'char' [-Wchar-subscripts] Add(Nod -> Son[c], T + 1, i); ^ main.cpp: In function 'void Solve()': main.cpp:86:28: warning: array subscript has type 'char' [-Wchar-subscripts] while(!Nod -> Son[c] && Nod != Root) ^ main.cpp:89:24: warning: array subscript has type 'char' [-Wchar-subscripts] if(Nod -> Son[c]) ^ main.cpp:91:31: warning: array subscript has type 'char' [-Wchar-subscripts] Nod = Nod -> Son[c]; ^ main.cpp: In constructor 'Trie::Trie()': main.cpp:24:20: warning: iteration 26 invokes undefined behavior [-Waggressive-loop-optimizations] Son[i] = NULL; ^ main.cpp:23:26: note: within this loop for(int i = 0; i < 28; i++) ~~^~~~