#zmienne
srednia = int(0)
ocena = int(0);
i = int(0)
ilosc_ocen = int(input("Podaj liczbe ocen: "))
#pętla wprowadzanie liczb oraz obliczanie sumy
while i < ilosc_ocen:
ocena = int(input("Podaj liczbe:"))
srednia+=ocena;
i+=1
#wyswietlanie sumy ocen
print("suma ocen wynosi: ",srednia)
#obliczanie oraz wyswietlanie sredniej ocen
srednia=srednia/ilosc_ocen
print("srednia ocen wynosi: ",srednia)
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