Compilare: main.cpp: In function 'void trie_push(trie*, char*, int)': main.cpp:21:11: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare] 21 | if (k == strlen (c)) | ~~^~~~~~~~~~~~~ main.cpp: In function 'bool trie_delete(trie*, char*, int)': main.cpp:37:10: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare] 37 | if (k == strlen (c)) | ~~^~~~~~~~~~~~~ main.cpp: In function 'void trie_querry(trie*, char*, int)': main.cpp:59:11: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare] 59 | if (k == strlen (c)) | ~~^~~~~~~~~~~~~ main.cpp: In function 'void trie_prefix(trie*, char*, int)': main.cpp:75:11: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare] 75 | if (k == strlen (c)) | ~~^~~~~~~~~~~~~