Compilare: user.cpp: In constructor ‘Trie::Trie()’: user.cpp:14:44: warning: passing NULL to non-pointer argument 2 of ‘void* memset(void*, int, size_t)’ [-Wconversion-null] memset (child, NULL, sizeof (child)); ^ user.cpp: In function ‘void insertTrie(Trie*, char*, int, int)’: user.cpp:24:15: warning: NULL used in arithmetic [-Wpointer-arith] if (*s == NULL) { ^ user.cpp: In function ‘int DFS(Trie*, int)’: user.cpp:60:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:106:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("ratina.in", "r", stdin); ^ user.cpp:107:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("ratina.out", "w", stdout); ^ user.cpp:112:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d%d ", &N, &Q); ^ user.cpp:115:17: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets (s); ^ user.cpp:124:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d", &n); ^ user.cpp:126:37: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d%d", &nod1, &nod2); ^ user.cpp:131:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d", &nod); ^ /tmp/ccoyeOWl.o: In function `main': user.cpp:(.text.startup+0xa0): warning: the `gets' function is dangerous and should not be used.