ModAdd

# -*- coding: utf-8 -*-
"""
Created on Sat Sep 22 23:30:55 2018

@author: Fırat
"""

from itertools import izip_longest



def solve(n1,n2):
    
    #result = []
    
    it = izip_longest(map(int,iter(n1[::-1])),map(int,iter(n2[::-1])),fillvalue = 0)
    

    #for i in it:
    #    tot = int(i[0])+int(i[1])
    #    result.append(tot if tot<10 else tot-10)
    
    
    
    result = [a+b if a+b<10 else a+b-10 for (a,b) in it]
    
    for element in result:
        if(element == 0):
            result.remove(element)
        else:
            break
    

    res=""
    for n in reversed(result):
        res+=str(n)
    
    return res
    
print(solve(input(),input()))

Test 1

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "input/code.py", line 8, in <module>
    from itertools import izip_longest
ImportError: cannot import name 'izip_longest'

Test 2

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "input/code.py", line 8, in <module>
    from itertools import izip_longest
ImportError: cannot import name 'izip_longest'

Test 3

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "input/code.py", line 8, in <module>
    from itertools import izip_longest
ImportError: cannot import name 'izip_longest'

Test 4

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "input/code.py", line 8, in <module>
    from itertools import izip_longest
ImportError: cannot import name 'izip_longest'

Test 5

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "input/code.py", line 8, in <module>
    from itertools import izip_longest
ImportError: cannot import name 'izip_longest'

Test 6

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "input/code.py", line 8, in <module>
    from itertools import izip_longest
ImportError: cannot import name 'izip_longest'

Test 7

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "input/code.py", line 8, in <module>
    from itertools import izip_longest
ImportError: cannot import name 'izip_longest'

Test 8

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "input/code.py", line 8, in <module>
    from itertools import izip_longest
ImportError: cannot import name 'izip_longest'

Test 9

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "input/code.py", line 8, in <module>
    from itertools import izip_longest
ImportError: cannot import name 'izip_longest'

Test 10

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "input/code.py", line 8, in <module>
    from itertools import izip_longest
ImportError: cannot import name 'izip_longest'