Baekjoon - while

[10952]

b = True
while b != False:
    a, b = map(int, input().split())
    if a == 0 and b == 0:
        break
    else:
        print(a+b)

 

[10951]

while True:
    try:
        a, b = map(int, input().split())
        print(a+b)
    except:
        break

 

[1110]

n = int(input())
check_n = n
cnt = 0

while True:
    temp = (n//10)+(n%10)
    new_n = ((n%10)*10)+(temp%10)
    cnt += 1
    if check_n == new_n:
        break
    n = new_n
print(cnt)