Compilare: user.cpp: In function ‘int main()’: user.cpp:18:13: warning: unused variable ‘y’ [-Wunused-variable] int i,x,y,s,j,k,q,ult,l,r,mid,sol; ^ user.cpp:18:15: warning: unused variable ‘s’ [-Wunused-variable] int i,x,y,s,j,k,q,ult,l,r,mid,sol; ^ user.cpp:18:19: warning: unused variable ‘k’ [-Wunused-variable] int i,x,y,s,j,k,q,ult,l,r,mid,sol; ^ user.cpp:18:21: warning: unused variable ‘q’ [-Wunused-variable] int i,x,y,s,j,k,q,ult,l,r,mid,sol; ^ user.cpp:19:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("order.in","r",stdin); ^ user.cpp:20:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("order.out","w",stdout); ^ user.cpp:21:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&N); ^ user.cpp:8:2: warning: ‘sol’ may be used uninitialized in this function [-Wmaybe-uninitialized] for(int i = poz; i <= N; i+=(i&-i)) ^ user.cpp:18:35: note: ‘sol’ was declared here int i,x,y,s,j,k,q,ult,l,r,mid,sol; ^