foo.cc: In function 'int main()':
foo.cc:8:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
    8 |  freopen("live.in","r",stdin);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~
foo.cc:9:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
    9 |  freopen("live.out","w",stdout);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
foo.cc:11:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   11 |  scanf("%d%d",&n,&w);
      |  ~~~~~^~~~~~~~~~~~~~
foo.cc:16:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   16 |   scanf("%d",&a[i]);
      |   ~~~~~^~~~~~~~~~~~

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Found 20 testcases.
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