<dp> 백준 17202번. 핸드폰 번호 궁합

https://www.acmicpc.net/problem/17202

17202번: 핸드폰 번호 궁합

a = list(map(int, input()))
b = list(map(int, input()))
arr = []
for i in range(16):
  if i % 2 == 0:
    arr.append(a[i//2])
  else :
    arr.append(b[i//2])

st="".join(str(s) for s in arr)


while len(arr) != 2:
    temp = []
    for i in range(len(arr)-1):
        num = (arr[i]+arr[i+1]) % 10
        temp.append(num)
    arr = temp
print(*temp, sep="")