Compilare: user.cpp: In function ‘int main()’: user.cpp:8:33: warning: variable ‘lin’ set but not used [-Wunused-but-set-variable] int n,dx,dy,i,j,k,minx,miny,lin,col; ^ user.cpp:8:37: warning: variable ‘col’ set but not used [-Wunused-but-set-variable] int n,dx,dy,i,j,k,minx,miny,lin,col; ^ user.cpp:9:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("tribute.in","r",stdin); ^ user.cpp:10:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("tribute.out","w",stdout); ^ user.cpp:11:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&n,&dx,&dy); ^ user.cpp:13:34: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&x[i],&y[i]); ^