ModAdd

#CSES ModAdd
#Konstantin Chukharev 22.9.
import sys

if __name__ == '__main__':
    s1=sys.stdin.readline()
    s2=sys.stdin.readline()
    d=len(s1)-len(s2)
    if d>0:
        print(s1[:d],end='')
        for i in range(0,len(s2)):
            print((int(s1[i+d])+int(s2[i]))%10,end='')
    elif d<0:
        print(s2[:-d],end='')
        for i in range(0,len(s1)):
            print((int(s1[i])+int(s2[i-d]))%10,end='')
    else:
        for i in range(0,len(s1)):
            print((int(s1[i])+int(s2[i]))%10,end='')

Test 1

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "input/code.py", line 19, in <module>
    print((int(s1[i])+int(s2[i]))%10,end='')
ValueError: invalid literal for int() with base 10: '\n'

Test 2

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "input/code.py", line 12, in <module>
    print((int(s1[i+d])+int(s2[i]))%10,end='')
ValueError: invalid literal for int() with base 10: '\n'

Test 3

Verdict: TIME LIMIT EXCEEDED

Test 4

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "input/code.py", line 16, in <module>
    print((int(s1[i])+int(s2[i-d]))%10,end='')
ValueError: invalid literal for int() with base 10: '\n'

Test 5

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "input/code.py", line 16, in <module>
    print((int(s1[i])+int(s2[i-d]))%10,end='')
ValueError: invalid literal for int() with base 10: '\n'

Test 6

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "input/code.py", line 12, in <module>
    print((int(s1[i+d])+int(s2[i]))%10,end='')
ValueError: invalid literal for int() with base 10: '\n'

Test 7

Verdict: TIME LIMIT EXCEEDED

Test 8

Verdict: TIME LIMIT EXCEEDED

Test 9

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "input/code.py", line 12, in <module>
    print((int(s1[i+d])+int(s2[i]))%10,end='')
ValueError: invalid literal for int() with base 10: '\n'

Test 10

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "input/code.py", line 16, in <module>
    print((int(s1[i])+int(s2[i-d]))%10,end='')
ValueError: invalid literal for int() with base 10: '\n'