foo.cc: In function 'int Div(int, int, std::vector<int>&)':
foo.cc:16:6: warning: unused variable 'i' [-Wunused-variable]
   16 |  int i=0;
      |      ^
foo.cc: In function 'int main()':
foo.cc:31:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   31 |  scanf("%d%d",&x,&y);
      |  ~~~~~^~~~~~~~~~~~~~

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