Compilare: main.cpp: In function 'void ad_cuv(int, Trie*, char*)': main.cpp:21:6: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(x==strlen(w)) ~^~~~~~~~~~~ main.cpp: In function 'bool del_cuv(int, Trie*, char*)': main.cpp:35:8: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(poz==strlen(w)) ~~~^~~~~~~~~~~ main.cpp: In function 'int print_nrcuv(int, Trie*, char*)': main.cpp:59:6: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(x==strlen(w)) ~^~~~~~~~~~~ main.cpp: In function 'int prefix_maxim(int, Trie*, char*)': main.cpp:67:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(q->fii[w[x]-'a']!=0&&x<strlen(w)) ~^~~~~~~~~~ main.cpp:69:6: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(x<strlen(w)) return x; ~^~~~~~~~~~