Compilare: main.cpp: In function 'void trie_push(trie*, char*, int)': main.cpp:18:9: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare] 18 | if(k==strlen(c)) | ~^~~~~~~~~~~ main.cpp: In function 'bool trie_delete(trie*, char*, int)': main.cpp:33:9: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare] 33 | if(k==strlen(c)) | ~^~~~~~~~~~~ main.cpp: In function 'void trie_query(trie*, char*, int)': main.cpp:53:9: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare] 53 | if(k==strlen(c)) | ~^~~~~~~~~~~ main.cpp: In function 'void trie_prefix(trie*, char*, int)': main.cpp:69:9: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare] 69 | if(k==strlen(c)) | ~^~~~~~~~~~~