foo.cc: In function 'int main()':
foo.cc:11:6: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   11 | scanf("%d", &n);
      | ~~~~~^~~~~~~~~~
foo.cc:12:35: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   12 | for (int i = 1; i <= n; i++) scanf("%d", &h[i]);
      |                              ~~~~~^~~~~~~~~~~~~

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