Compilare: user.cpp: In function ‘void Read()’: user.cpp:16:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:18:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&a[i]); ^ user.cpp: In function ‘void Construct()’: user.cpp:43:33: warning: ‘pos’ may be used uninitialized in this function [-Wmaybe-uninitialized] prev[i] = index[pos - 1]; ~~~~^~~