foo.cc:13:0: warning: ignoring #pragma warning  [-Wunknown-pragmas]
 #pragma warning(disable : 4996)
 
foo.cc: In function 'int main()':
foo.cc:16:24: warning: unused variable 'a0' [-Wunused-variable]
  long long a1, a2, a3, a0, num = 2, ans = 0, num1;
                        ^~
foo.cc:73:6: warning: 'a3' may be used uninitialized in this function [-Wmaybe-uninitialized]
  num += a3;
  ~~~~^~~~~

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