diff --git a/Ad Server Session Algo.py b/Ad Server Session Algo.py
index 7e0f511..f52e94e 100644
--- a/Ad Server Session Algo.py	
+++ b/Ad Server Session Algo.py	
@@ -4,7 +4,9 @@
 import string
 import numpy as np
 import sys
-
+# proces wstępny
+input = pd.read_csv ('yoda_exp_hr_user_askfm.csv', sep = ",", kodowanie = 'utf-16') # przeczytaj plik
+input ['request_time'] = input.request_time.str.split ('.'). str [0]; #trucnate the microsec
 #pre-process
 input=pd.read_csv('yoda_exp_hr_user_askfm.csv',sep=",",encoding='utf-16')        #read file
 input['request_time']=input.request_time.str.split('.').str[0];                 #trucnate the microsec