Compilare: main.cpp: In function 'void Add(Trie*&, int)': main.cpp:29:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(k == s.size()) ~~^~~~~~~~~~~ main.cpp: In function 'bool Delete(Trie*&, int)': main.cpp:45:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(k == s.size()) ~~^~~~~~~~~~~ main.cpp:62:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ main.cpp: In function 'int Query(Trie*&, int)': main.cpp:68:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(k == s.size()) ~~^~~~~~~~~~~ main.cpp: In function 'int Prefix(Trie*&, int)': main.cpp:83:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(k == s.size()) ~~^~~~~~~~~~~ main.cpp:83:5: warning: this 'if' clause does not guard... [-Wmisleading-indentation] if(k == s.size()) ^~ main.cpp:85:9: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if' if(nod->fii[(s[k]-'a')] != NULL && (nod->fii[s[k]-'a']->nr || nod->fii[s[k]-'a']->sons )) ^~