Compilare: main.cpp: In function 'void trie_insert(std::__cxx11::string, int)': main.cpp:18:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<trie[p].size(); i++ ){ ~^~~~~~~~~~~~~~~ main.cpp: In function 'void trie_delete(std::__cxx11::string, int)': main.cpp:51:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<trie[p].size(); i++){ ~^~~~~~~~~~~~~~~ main.cpp: In function 'int trie_aparitii(std::__cxx11::string, int)': main.cpp:96:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<trie[p].size(); i++){ ~^~~~~~~~~~~~~~~ main.cpp: In function 'int trie_prefix(std::__cxx11::string, int)': main.cpp:119:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<trie[p].size(); i++){ ~^~~~~~~~~~~~~~~