foo.cc: In function 'int main()':
foo.cc:15:9: 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("%d",&t);
      |  ~~~~~^~~~~~~~~
foo.cc:20:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   20 |   scanf("%d%d%d",&n,&l,&k);
      |   ~~~~~^~~~~~~~~~~~~~~~~~~
foo.cc:23:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   23 |    scanf("%d",&cr[i].loc);
      |    ~~~~~^~~~~~~~~~~~~~~~~
foo.cc:28:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   28 |    scanf("%d",&cr[i].jz);
      |    ~~~~~^~~~~~~~~~~~~~~~

Found 10 testcases.
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