/in/foo.cc: In member function 'void point::input()':
/in/foo.cc:17:35: warning: format '%d' expects argument of type 'int*', but argument 2 has type 'll* {aka long long int*}' [-Wformat=]
         scanf("%I64d%I64d",&_x,&_y);
                                   ^
/in/foo.cc:17:35: warning: format '%d' expects argument of type 'int*', but argument 3 has type 'll* {aka long long int*}' [-Wformat=]
/in/foo.cc: In function 'int main()':
/in/foo.cc:145:25: warning: format '%d' expects argument of type 'int', but argument 2 has type 'll {aka long long int}' [-Wformat=]
     printf("%I64d",ans*2);
                         ^