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// @Title: 最长特殊序列 Ⅰ (Longest Uncommon Subsequence I)
// @Author: 15816537946@163.com
// @Date: 2022-03-05 10:36:01
// @Runtime: 0 ms
// @Memory: 1.9 MB
func findLUSlength(a string, b string) int {
    i, j := len(a),len(b)
    if i > j {
        return i
    } else if i < j {
        return j
    }
    
    if a == b {
        return -1
    }
    return i
    
}