foo.c: In function 'main':
foo.c:18:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
18 | scanf("%d%d",&n1,&n2);
| ^~~~~~~~~~~~~~~~~~~~~
foo.c:20:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
20 | scanf("%d",&arr[i]);
| ^~~~~~~~~~~~~~~~~~~
foo.c:22:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
22 | scanf("%d",&b[i]);
| ^~~~~~~~~~~~~~~~~
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