/in/foo.cc: In function 'int main()':
/in/foo.cc:13:7: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   if(i>mp.size()){
      ~^~~~~~~~~~
/in/foo.cc:15:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   }else if(i==mp.size()){
            ~^~~~~~~~~~~