func largestMerge(s, t string) string { n := len(s) sa := *(*[]int32)(unsafe.Pointer(reflect.ValueOf(suffixarray.New([]byte(s + "#" + t))).Elem().FieldByName("sa").Field(0).UnsafeAddr())) rank := make([]int, n+1+len(t)) for i := range rank { rank[sa[i]] = i } ans := []byte{} i, j := 0, n+1 for { if s == "" { ans = append(ans, t...) break } if t == "" { ans = append(ans, s...) break } if rank[i] > rank[j] { // s > t ans = append(ans, s[0]) s = s[1:] i++ } else { ans = append(ans, t[0]) t = t[1:] j++ } } return string(ans) }
1754. Largest Merge Of Two Strings You are given two strings word1 and word2. You want to construct a string merge in the following way: while either word1 or word2 are non-empty, choose one of the following options:
If word1 is non-empty, append the first character in word1 to merge and delete it from word1. For example, if word1 = "abc" and merge = "dv", then after choosing this operation, word1 = "bc" and merge = "dva". If word2 is non-empty, append the first character in word2 to merge and delete it from word2. For example, if word2 = "abc" and merge = "", then after choosing this operation, word2 = "bc" and merge = "a". Return the lexicographically largest merge you can construct.
A string a is lexicographically larger than a string b (of the same length) if in the first position where a and b differ, a has a character strictly larger than the corresponding character in b. For example, "abcd" is lexicographically larger than "abcc" because the first position they differ is at the fourth character, and d is greater than c.
Example 1:
Input: word1 = "cabaa", word2 = "bcaaa" Output: "cbcabaaaaa" Explanation: One way to get the lexicographically largest merge is: - Take from word1: merge = "c", word1 = "abaa", word2 = "bcaaa" - Take from word2: merge = "cb", word1 = "abaa", word2 = "caaa" - Take from word2: merge = "cbc", word1 = "abaa", word2 = "aaa" - Take from word1: merge = "cbca", word1 = "baa", word2 = "aaa" - Take from word1: merge = "cbcab", word1 = "aa", word2 = "aaa" - Append the remaining 5 a's from word1 and word2 at the end of merge. Example 2:
Input: word1 = "abcabc", word2 = "abdcaba" Output: "abdcabcabcaba"
Constraints:
1 <= word1.length, word2.length <= 3000 word1 and word2 consist only of lowercase English letters.
1754. 构造字典序最大的合并字符串 https://leetcode.cn/problems/largest-merge-of-two-strings/
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标签：反射,string,ans,merge,word1,word2,字符串,append,指针 From： https://www.cnblogs.com/rsapaper/p/16999594.html