Compilare: user.cpp: In function ‘int main()’: user.cpp:16:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("secventa.in","r",stdin); ^ user.cpp:17:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&k); ^ user.cpp:25:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&a[i]); ^ user.cpp:36:18: warning: ‘y’ may be used uninitialized in this function [-Wmaybe-uninitialized] out<<x<<' '<<y<<' '<<mx<<'\n'; ^ user.cpp:36:10: warning: ‘x’ may be used uninitialized in this function [-Wmaybe-uninitialized] out<<x<<' '<<y<<' '<<mx<<'\n'; ^