foo.cc: In function 'int main()':
foo.cc:34:20: warning: format '%lld' expects argument of type 'long long int', but argument 2 has type 'int' [-Wformat=]
   34 |         printf("%lld\n",total);
      |                 ~~~^    ~~~~~
      |                    |    |
      |                    |    int
      |                    long long int
      |                 %d

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