foo.cc:11:1: error: 'Copy' does not name a type
   11 | Copy
      | ^~~~
foo.cc:44:5: error: redefinition of 'int main()'
   44 | int main()
      |     ^~~~
foo.cc:5:5: note: 'int main()' previously defined here
    5 | int main(){
      |     ^~~~
foo.cc: In function 'int main()':
foo.cc:48:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   48 |     scanf("%d",&n);
      |     ~~~~~^~~~~~~~~

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