T1

Billetes = [50,20,10,5,1]
Cambio = {50: 0, 20: 0, 10: 0, 5: 0, 1: 0}
Data = [0,0]
cammount = 0

def calculate():
    cambio2 = 0
    global cammount
    for i in Billetes:
        cambio2 = cammount//i
        if cambio2 !=0:
            Cambio[i] += cambio2
            cammount -= (i*cambio2)
            if cammount==0:
                break

Data[0] = (int)(input("Input your bill ammount: "))
Data [1] = (int)(input("Input your payment ammount: "))

if Data[0] > Data[1]:
    print ("Invalid: Bill ammount is greater than payment ammount")
if (Data[0] - Data[1]) == 0:
    for keys,values in Cambio.items():
        print(keys, ':', values)
else:
    cammount = Data [1] - Data [0]
    print("El cambio es:", cammount )
    calculate()
    for keys,values in Cambio.items():
        print(keys, ':', values)