/in/foo.cc:2:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main(){printf("%lld",114514*1919810);}
      ^
/in/foo.cc: In function 'int main()':
/in/foo.cc:2:28: warning: integer overflow in expression [-Woverflow]
 main(){printf("%lld",114514*1919810);}
                      ~~~~~~^~~~~~~~
/in/foo.cc:2:36: warning: format '%lld' expects argument of type 'long long int', but argument 2 has type 'int' [-Wformat=]
 main(){printf("%lld",114514*1919810);}
                                    ^