Compilare: user.cpp: In function ‘int main()’: user.cpp:10:24: warning: unused variable ‘dif’ [-Wunused-variable] int n,q,i,prim,x,y,dif,cnt=0; ^ user.cpp:10:28: warning: unused variable ‘cnt’ [-Wunused-variable] int n,q,i,prim,x,y,dif,cnt=0; ^ user.cpp:8:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("densitate.in","r",stdin); ^ user.cpp:9:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("densitate.out","w",stdout); ^