Compilare: user.cpp: In function ‘void afis()’: user.cpp:15:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < trie.size(); i++) { ^ user.cpp:18:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < trie[i].size(); j++) { ^ user.cpp: In function ‘void adauga()’: user.cpp:33:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (k < trie[R].size() && poz <= n) { ^ user.cpp:48:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(R + 21>= trie.size()) { ^