/in/foo.cc: In function 'int main()':
/in/foo.cc:68:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=0;i<=lsh.size();i++){
                 ~^~~~~~~~~~~~
/in/foo.cc:103:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         if((!c || c==1) && posx1>=0 && posx1<yeq[y].size()){
                                        ~~~~~^~~~~~~~~~~~~~
/in/foo.cc:109:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         if((!c || c==2) && posx2>=0 && posx2<yeq[y].size()){
                                        ~~~~~^~~~~~~~~~~~~~
/in/foo.cc:118:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         if((!c || c==3) && posy1>=0 && posy1<xeq[x].size()){
                                        ~~~~~^~~~~~~~~~~~~~
/in/foo.cc:124:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         if((!c || c==4) && posy2>=0 && posy2<xeq[x].size()){
                                        ~~~~~^~~~~~~~~~~~~~