foo.cc: In function 'int main()':
foo.cc:58:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   58 |  scanf("%d%d%d",&n,&b,&c);
      |  ~~~~~^~~~~~~~~~~~~~~~~~~
foo.cc:61:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   61 |   scanf("%d",&a[i]);
      |   ~~~~~^~~~~~~~~~~~

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