Compilare: main.cpp: In function 'void dfs(trie*)': main.cpp:43:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<nod->v.size(); i++){ ~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:80:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<strlen(c); i++){ ~^~~~~~~~~~