/in/foo.cc: In function 'int main()':
/in/foo.cc:95:29: warning: format '%Lf' expects argument of type 'long double*', but argument 2 has type 'double*' [-Wformat=]
         scanf("%Lf", &a[i].x);
                             ^
/in/foo.cc:96:29: warning: format '%Lf' expects argument of type 'long double*', but argument 2 has type 'double*' [-Wformat=]
         scanf("%Lf", &a[i].y);
                             ^
/in/foo.cc:97:31: warning: format '%Lf' expects argument of type 'long double*', but argument 2 has type 'double*' [-Wformat=]
         scanf("%Lf", &a[i].dis);
                               ^