Compilare: user.cpp: In function ‘arbore query(int, int, int, int, int)’: user.cpp:3:22: warning: statement has no effect [-Wunused-value] # define mij ((st+dr)>>1) ^ user.cpp:41:7: note: in expansion of macro ‘mij’ { int mij; ^ user.cpp: In function ‘int main()’: user.cpp:57:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("sequencequery.in","r",stdin); ^ user.cpp:58:44: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("sequencequery.out","w",stdout); ^ user.cpp:59:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d\n",&n,&m); ^ user.cpp:62:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&v[i]); ^ user.cpp:69:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d\n",&x,&y); ^ user.cpp: In function ‘arbore query(int, int, int, int, int)’: user.cpp:53:1: warning: control reaches end of non-void function [-Wreturn-type] } ^