/in/foo.c: In function 'main':
/in/foo.c:8:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
    8 |  scanf("%d",&n);
      |  ^~~~~~~~~~~~~~
/in/foo.c:10:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   10 |   scanf("%d",&m);
      |   ^~~~~~~~~~~~~~
/in/foo.c:13:4: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   13 |    scanf("%d",&arr[j]);
      |    ^~~~~~~~~~~~~~~~~~~