/in/foo.cc: In function 'int main()':
/in/foo.cc:17:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
              for(j=0;j<save[i].size()-1;++j){ 
                      ~^~~~~~~~~~~~~~~~~
/in/foo.cc:18:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
                  for(k=j+1;k<save[i].size();++k){  
                            ~^~~~~~~~~~~~~~~
/in/foo.cc:28:13: error: expected '}' at end of input
     return 0;
             ^