/in/foo.cc: In function 'int main()':
/in/foo.cc:35:28: warning: format '%d' expects argument of type 'int*', but argument 2 has type 'double*' [-Wformat=]
   scanf("%d %d",&x[i],&y[i]);
                            ^
/in/foo.cc:35:28: warning: format '%d' expects argument of type 'int*', but argument 3 has type 'double*' [-Wformat=]
/in/foo.cc:54:19: warning: format '%d' expects argument of type 'int', but argument 2 has type 'double' [-Wformat=]
  printf("%.1d",ans);
                   ^