number = int(input("Enter a number: "))
temp = 0
for i in range(1,number+1):
    temp = temp + i
print("Sum of numbers to",number,"is",temp)






###############################################




arr = [5,10,15,20,25,50,0]
index = 0
for i in arr :
    if i == 20 :
        break
    index += 1
    
print("The index value of 20 is :",index)

arr.append(index)
print("The list after adding this value is",arr)