foo.cc: In function 'int main()':
foo.cc:36:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   36 |  scanf("%d",&n);
      |  ~~~~~^~~~~~~~~
foo.cc:39:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   39 |   scanf("%d",&a[i]);
      |   ~~~~~^~~~~~~~~~~~
foo.cc:41:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   41 |  scanf("%d",&insert);
      |  ~~~~~^~~~~~~~~~~~~~
foo.cc: In function 'void Insert(int*, int, int)':
foo.cc:11:6: warning: 'flag' may be used uninitialized in this function [-Wmaybe-uninitialized]
   11 |  int flag;
      |      ^~~~

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