foo.cc: In function 'int main()':
foo.cc:15:8: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   15 | freopen("gem.in","r",stdin);
      | ~~~~~~~^~~~~~~~~~~~~~~~~~~~
foo.cc:16:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   16 |  freopen("gem.out","w",stdout);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
foo.cc:17:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   17 |  scanf("%lld",&T);
      |  ~~~~~^~~~~~~~~~~
foo.cc:21:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   21 |   scanf("%lld%lld%lld",&n,&t,&k);
      |   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
foo.cc:23:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   23 |    scanf("%lld",&a[i].place);
      |    ~~~~~^~~~~~~~~~~~~~~~~~~~
foo.cc:25:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   25 |    scanf("%lld",&a[i].value);
      |    ~~~~~^~~~~~~~~~~~~~~~~~~~

Found 10 testcases.
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