foo.cc: In function 'std::ostream operator<<(std::ostream&, Array&)':
foo.cc:45:9: warning: no return statement in function returning non-void [-Wreturn-type]
   45 |         }
      |         ^
foo.cc: In function 'int main()':
foo.cc:58:23: warning: 'n' is used uninitialized [-Wuninitialized]
   58 |         a = new int[n + 10];
      |                     ~~^~~~

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