Compilare: main.cpp: In function 'void ins(Trie*, int)': main.cpp:16:10: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 16 | if (pos == s.size()) { | ~~~~^~~~~~~~~~~ main.cpp: In function 'int del(Trie*, int)': main.cpp:27:10: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 27 | if (pos == s.size()) { | ~~~~^~~~~~~~~~~ main.cpp:30:2: warning: this 'else' clause does not guard... [-Wmisleading-indentation] 30 | else | ^~~~ main.cpp:35:3: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'else' 35 | if (nod -> nr_fii == 0 && nod -> nr_cuvinte == 0 && nod != T) { | ^~ main.cpp: In function 'int ans(Trie*, int)': main.cpp:41:10: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 41 | if (pos == s.size()) { | ~~~~^~~~~~~~~~~ main.cpp: In function 'int pref(Trie*, int, int)': main.cpp:49:10: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 49 | if (pos == s.size() || nod -> fiu[s[pos] - 'a'] == 0) | ~~~~^~~~~~~~~~~