Compilare: main.cpp: In function 'void adauga(trie*, char*)': main.cpp:25:12: warning: NULL used in arithmetic [-Wpointer-arith] if(*s==NULL) ^~~~ main.cpp: In function 'int solutie(trie*, char*)': main.cpp:32:12: warning: NULL used in arithmetic [-Wpointer-arith] if(*s==NULL) ^~~~ main.cpp: In function 'void dfs(trie*)': main.cpp:37:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<nod->v.size();i++){ ~^~~~~~~~~~~~~~