Compilare: main.cpp: In constructor 'Trie::Trie()': main.cpp:25:38: warning: passing NULL to non-pointer argument 2 of 'void* memset(void*, int, size_t)' [-Wconversion-null] memset(fii, NULL, sizeof(fii)); ^ main.cpp: In function 'void BFT(Trie*)': main.cpp:86:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < f->ind.size(); j++) ~~^~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:112:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < s.size(); i++) ~~^~~~~~~~~~