foo.cc: In function 'int main()':
foo.cc:16:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    if(q.size()>m){
       ~~~~~~~~^~
foo.cc:9:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d",&m,&n);
  ~~~~~^~~~~~~~~~~~~~
foo.cc:11:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d",&k);
   ~~~~~^~~~~~~~~

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