foo.cc: In function 'int main()':
foo.cc:17:14: warning: format '%d' expects argument of type 'int', but argument 2 has type 'int*' [-Wformat=]
   17 |     printf("%d\n",f[k]);
      |             ~^    ~~~~
      |              |       |
      |              int     int*
      |             %n

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