Mã chấm: 99393

Main.cc: In function ‘int main()’:
Main.cc:22:9: error: redeclaration of ‘int n’
     int n, a[n];
         ^
Main.cc:20:9: note: ‘int n’ previously declared here
     int n;
         ^
Main.cc:21:10: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d",&n);
     ~~~~~^~~~~~~~~
Main.cc:24:8: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d",&a[i]);
   ~~~~~^~~~~~~~~~~~