foo.cc: In function 'int main()':
foo.cc:9:17: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    9 |     int n; scanf("%d", &n);
      |            ~~~~~^~~~~~~~~~
foo.cc:12:21: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   12 |         int x; scanf("%d", &x);
      |                ~~~~~^~~~~~~~~~

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