Compilare: user.cpp: In function ‘int main()’: user.cpp:83:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(st.size()>nmx) ^ user.cpp:46:11: warning: unused variable ‘m’ [-Wunused-variable] int n,m,i,j,nd=0,sz,mx=-1,ndis,nmx=0,mxd=0,nmxd; ^ user.cpp:46:25: warning: unused variable ‘mx’ [-Wunused-variable] int n,m,i,j,nd=0,sz,mx=-1,ndis,nmx=0,mxd=0,nmxd; ^ user.cpp:46:31: warning: unused variable ‘ndis’ [-Wunused-variable] int n,m,i,j,nd=0,sz,mx=-1,ndis,nmx=0,mxd=0,nmxd; ^ user.cpp:44:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cerc3.in","r",stdin); ^ user.cpp:45:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cerc3.out","w",stdout); ^ user.cpp:48:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:51:59: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lf%lf%lf",&ce[i].c.x,&ce[i].c.y,&ce[i].ra); ^