Compilare: main.cpp: In constructor 'Trie::Trie()': main.cpp:23:37: warning: passing NULL to non-pointer argument 2 of 'void* memset(void*, int, size_t)' [-Wconversion-null] memset(son, NULL, sizeof son); ^ main.cpp: In function 'void addTrie(Trie*, int, int)': main.cpp:32:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i == aux.size()) ~~^~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:85:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < a.size(); i ++) { ~~^~~~~~~~~~