foo.cc: In function 'int main()':
foo.cc:48:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   48 |  scanf("%d", &n);
      |  ~~~~~^~~~~~~~~~
foo.cc:50:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   50 |   scanf("%d", &x);
      |   ~~~~~^~~~~~~~~~
foo.cc:54:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   54 |   scanf("%d", &A[i]);
      |   ~~~~~^~~~~~~~~~~~~

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