foo.cc: In function 'int main()':
foo.cc:8:14: warning: format '%lld' expects argument of type 'long long int', but argument 2 has type 'int' [-Wformat=]
    8 |   printf("%lld\n",3);
      |           ~~~^    ~
      |              |    |
      |              |    int
      |              long long int
      |           %d
foo.cc:12:14: warning: format '%lld' expects argument of type 'long long int', but argument 2 has type 'const char*' [-Wformat=]
   12 |   printf("%lld\n","18446744073709551616");
      |           ~~~^    ~~~~~~~~~~~~~~~~~~~~~~
      |              |    |
      |              |    const char*
      |              long long int
      |           %s
foo.cc:5:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    5 |     scanf("%lld%lld",&a,&b);
      |     ~~~~~^~~~~~~~~~~~~~~~~~

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