foo.cc: In function 'int main()':
foo.cc:11:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   11 |  scanf ("%d",&n);
      |  ~~~~~~^~~~~~~~~
foo.cc:19:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   19 |   scanf ("%d%d",&k,&p);
      |   ~~~~~~^~~~~~~~~~~~~~
foo.cc:37:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   37 |  scanf ("%d",&m);
      |  ~~~~~~^~~~~~~~~
foo.cc:40:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   40 |   scanf ("%d",&f);
      |   ~~~~~~^~~~~~~~~

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Found 5 testcases.
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