import pandas as pd
logs = pd.read_csv('/datasets/yandex_metrika_logs.csv')

logs_with_duration = logs[logs['ym:s:visitDuration'] > 0]

ad_visits = logs_with_duration[logs_with_duration['ym:s:lastTrafficSource'] == 'ad']
organic_visits = logs_with_duration[logs_with_duration['ym:s:lastTrafficSource'] == 'organic']

print(ad_visits.head(10))
print(organic_visits.head(10))