foo.c: In function 'main':
foo.c:10:5: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   10 |     scanf("%c",&s1[i]);
      |     ^~~~~~~~~~~~~~~~~~
foo.c:21:5: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   21 |     scanf("%c",&s2[i]);
      |     ^~~~~~~~~~~~~~~~~~

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