foo.cc: In function 'int main()':
foo.cc:12:9: warning: unused variable 'max' [-Wunused-variable]
   12 |     int max = 0;
      |         ^~~
foo.cc:7:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    7 |     scanf("%d", &n);
      |     ~~~~~^~~~~~~~~~
foo.cc:9:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    9 |         scanf("%d", &x);
      |         ~~~~~^~~~~~~~~~

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