foo.cc: In function 'void work()':
foo.cc:103:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  103 |  scanf("%d%lf%d%d",&n,&wf,&s,&t);
      |  ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
foo.cc:107:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  107 |    scanf("%lf%lf",&x[(i-1)*4+j],&y[(i-1)*4+j]);
      |    ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
foo.cc:108:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  108 |   scanf("%lf",&wt[(i-1)*4+1]);
      |   ~~~~~^~~~~~~~~~~~~~~~~~~~~~
foo.cc: In function 'int main()':
foo.cc:124:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  124 |  scanf("%d",&tz);
      |  ~~~~~^~~~~~~~~~

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