foo.c: In function 'main':
foo.c:5:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
5 | scanf("%d%d%d",&m,&n,&p);
| ^~~~~~~~~~~~~~~~~~~~~~~~
foo.c:9:4: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
9 | scanf("%d",&a[i][j]);
| ^~~~~~~~~~~~~~~~~~~~
foo.c:13:4: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
13 | scanf("%d",&b[i1][j1]);
| ^~~~~~~~~~~~~~~~~~~~~~
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