foo.cc: In function 'int main()':
foo.cc:16:9: warning: too many arguments for format [-Wformat-extra-args]
   16 |  printf("\n", sum);
      |         ^~~~
foo.cc:34:9: warning: too many arguments for format [-Wformat-extra-args]
   34 |  printf("\n", sum);
      |         ^~~~

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