foo.c:36:5: error: redefinition of 'main'
   36 | int main(){
      |     ^~~~
foo.c:2:5: note: previous definition of 'main' was here
    2 | int main()
      |     ^~~~
foo.c: In function 'main':
foo.c:6:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
    6 |  scanf("%d %d",&n,&k);
      |  ^~~~~~~~~~~~~~~~~~~~
foo.c:8:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
    8 |   scanf("%d",&a[i]);
      |   ^~~~~~~~~~~~~~~~~
foo.c: In function 'main':
foo.c:39:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   39 |  scanf("%d %d",&n,&k);
      |  ^~~~~~~~~~~~~~~~~~~~
foo.c:41:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   41 |   scanf("%d",&a[i]);
      |   ^~~~~~~~~~~~~~~~~

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