foo.cc:9: warning: ignoring #pragma comment  [-Wunknown-pragmas]
    9 | #pragma comment(linker,"/STACK:1024000000,1024000000")
      | 
foo.cc: In function 'int main()':
foo.cc:41:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   41 |  freopen("1.txt","r",stdin);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~
foo.cc:52:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   52 |   scanf("%d%d",&m,&cas);
      |   ~~~~~^~~~~~~~~~~~~~~~
foo.cc:56:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   56 |    scanf("%d%d%d",&x,&y,&z);
      |    ~~~~~^~~~~~~~~~~~~~~~~~~

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