Compilare: user.cpp: In function ‘void readandturn()’: user.cpp:26:11: warning: unused variable ‘j’ [-Wunused-variable] int i,j,x,y,z; ^ user.cpp: In function ‘int query()’: user.cpp:41:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<h[k].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:53:11: warning: unused variable ‘j’ [-Wunused-variable] int i,j; ^ user.cpp: In function ‘void readandturn()’: user.cpp:27:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&m); ^ user.cpp:31:35: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d",&x,&y,&z); ^ user.cpp: In function ‘int main()’: user.cpp:54:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("brazi.in","r",stdin); ^ user.cpp:55:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("brazi.out","w",stdout); ^ user.cpp:56:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^