Compilare: main.cpp: In function 'void Insert(trie*, int, int)': main.cpp:24:9: warning: unused variable 'bit2' [-Wunused-variable] int bit2=bit+1; ^~~~ main.cpp: In function 'int Query(trie*, int, int)': main.cpp:41:9: warning: unused variable 'bit2' [-Wunused-variable] int bit2=bit+1; ^~~~ main.cpp: In function 'int main()': main.cpp:54:31: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("rk.in","r",stdin); ^ main.cpp:55:33: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("rk.out","w",stdout); ^ main.cpp:59:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ main.cpp:65:23: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&x); ^ main.cpp:69:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&q); ^ main.cpp:73:28: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&r,&k); ^