如何编写一个程序，不断从用户那里获取输入，直到所有输入的总和达到 200

Question

The numbers permissible for the user input are: 10, 20 and 50. If any other number is entered, then the program should declare it as invalid.

I've tried the following but it doesn't seem to work out:

count = 0
total = 0
print("Enter the values of amounts collected")

while True:
    new_number = input('> ')
    count = count + 1
    total = total + int(new_number)
    if total==200 :
        print("You have successfully collected 200")
        break
    if total>200:
        print("Amount collected exceeds 200")
        break

Sample input:

> 10
> 50
> 50
> 50
> 10
> 20
> 10

Sample output:

You have successfully collected 200

Sample input:

> 190
...

Sample output:

Invalid input

Sample input:

> 50
> 50
> 50
> 20
> 50

Sample output:

Amount collected exceeds 200

Answer 1

You just need nested if condition

total = 0
print("Enter the values of amounts collected")
while total<200:               # Loop in until total < 200
new_number = int(input('> '))
if new_number in [10,20,50]:   # First check input number is in 10,20,50
    total = total + new_number # Then add sum to total

    if total == 200:           # If total = 200 break
        print("You have successfully collected 200")
        break

    elif total >200:           # If total > 200 break
        print("Amount collected exceeds 200")
        break
else:                         # If number not in 10,20,50 then print invalid input
    print("Invalid input")