题目：

题解：

func addBinary(a string, b string) string {ans := ""carry := 0lenA, lenB := len(a), len(b)n := max(lenA, lenB)for i := 0; i < n; i++ {if i < lenA {carry += int(a[lenA-i-1] - '0')}if i < lenB {carry += int(b[lenB-i-1] - '0')}ans = strconv.Itoa(carry%2) + anscarry /= 2}if carry > 0 {ans = "1" + ans}return ans
}func max(x, y int) int {if x > y {return x}return y
}