/in/foo.cc: In function 'int main()':
/in/foo.cc:70:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=0;i<=lsh.size();i++){
                 ~^~~~~~~~~~~~
/in/foo.cc:105:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         if((!c || c==1) && posx1>=0 && posx1<yeq[y].size()){
                                        ~~~~~^~~~~~~~~~~~~~
/in/foo.cc:111:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         if((!c || c==2) && posx2>=0 && posx2<yeq[y].size()){
                                        ~~~~~^~~~~~~~~~~~~~
/in/foo.cc:120:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         if((!c || c==3) && posy1>=0 && posy1<xeq[x].size()){
                                        ~~~~~^~~~~~~~~~~~~~
/in/foo.cc:126:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         if((!c || c==4) && posy2>=0 && posy2<xeq[x].size()){
                                        ~~~~~^~~~~~~~~~~~~~