foo.cc: In function 'int main()':
foo.cc:7:11: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    7 |     scanf ("%d %d",&n,&m);
      |     ~~~~~~^~~~~~~~~~~~~~~
foo.cc:9:15: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    9 |         scanf ("%d",&x[i]);
      |         ~~~~~~^~~~~~~~~~~~
foo.cc:12:15: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   12 |         scanf ("%d",&c[i]);
      |         ~~~~~~^~~~~~~~~~~~

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Found 10 testcases.
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