foo.cc: In function 'int main()':
foo.cc:10:19: error: expected ')' before ';' token
   10 |  printf("%11d\n",s;
      |        ~          ^
      |                   )
foo.cc:7:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    7 |  scanf("%d",&n);
      |  ~~~~~^~~~~~~~~

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