add the distance to the last cell

partitioning/partitioning.cpp

@@ -416,6 +416,7 @@ void csvbm_streaming(const std::string& reads_path, const std::string& csvbm_pat
         std::getline(input_read_file, line);
         std::getline(input_read_file, line);
     }
+    temp_output_file << std::to_string(distance-1) + "\n"; // write the distance to the last cell
 
     input_read_file.close();
     temp_output_file.close();