'''
Given a string as a+b expression, where a and b are integers, return a sum of a and b as an integer.

Example 1
Input:
4+2
Output:
6
'''
class Solution(object):
    def solve(self, expression:str) -> int:
        print(f"expression: {expression}")
        left, right = expression.split('+')
        int_left = int(left)
        int_right = int(right)
        sum = int_left + int_right
        return sum
    
s = Solution()
print(s.solve("4+2"))  # Output: 6
print(s.solve("10+20"))  # Output: 30