foo.c: In function 'main':
foo.c:21:17: warning: variable 'max2' set but not used [-Wunused-but-set-variable]
   21 |  int n1,n2,max1,max2;
      |                 ^~~~
foo.c:21:12: warning: variable 'max1' set but not used [-Wunused-but-set-variable]
   21 |  int n1,n2,max1,max2;
      |            ^~~~
foo.c:22:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   22 |  scanf("%d%d",&n1,&n2);
      |  ^~~~~~~~~~~~~~~~~~~~~
foo.c:25:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   25 |   scanf("%d",&a[i]);
      |   ^~~~~~~~~~~~~~~~~
foo.c:29:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   29 |   scanf("%d",&b[i]);
      |   ^~~~~~~~~~~~~~~~~

[Hydro](https://hydro.ac)提供评测服务