LeetCode 744. Find Smallest Letter Greater Than Target

Given a list of sorted characters letters containing only lowercase letters, and given a target letter target, find the smallest element in the list that is larger than the given target.

Letters also wrap around. For example, if the target is target = ‘z’ and letters = [‘a’, ‘b’], the answer is ‘a’.

Examples:
Input:
letters = [“c”, “f”, “j”]
target = “a”
Output: “c”

Input:
letters = [“c”, “f”, “j”]
target = “c”
Output: “f”

Input:
letters = [“c”, “f”, “j”]
target = “d”
Output: “f”

Input:
letters = [“c”, “f”, “j”]
target = “g”
Output: “j”

Input:
letters = [“c”, “f”, “j”]
target = “j”
Output: “c”

Input:
letters = [“c”, “f”, “j”]
target = “k”
Output: “c”
Note:
letters has a length in range [2, 10000].
letters consists of lowercase letters, and contains at least 2 unique letters.
target is a lowercase letter.

分析：用upper_bound返回第一个大于target的元素所在位置，如果这个位置等于letters.end()说明不存在，则返回letters的第一个值，否则返回it所在位置的元素值即可～

class Solution {
public:char nextGreatestLetter(vector<char>& letters, char target) {auto it = upper_bound(letters.begin(), letters.end(), target);return it == letters.end() ? letters[0] : *it;}
};

LeetCode 744. Find Smallest Letter Greater Than Target相关推荐

LeetCode 744. Find Smallest Letter Greater Than Target (时间复杂度O（n）)
题目太简单了,直接上代码: class Solution { public:char nextGreatestLetter(vector<char>& letters, char ...
C#LeetCode刷题之#744-寻找比目标字母大的最小字母（Find Smallest Letter Greater Than Target）
问题该文章的最新版本已迁移至个人博客[比特飞],单击链接 https://www.byteflying.com/archives/4001 访问. 给定一个只包含小写字母的有序数组letters 和 ...
Leetcode744.Find Smallest Letter Greater Than Target寻找比目标字母大的最小字母
给定一个只包含小写字母的有序数组letters 和一个目标字母 target,寻找有序数组里面比目标字母大的最小字母. 数组里字母的顺序是循环的.举个例子,如果目标字母target = 'z' 并且有 ...
LeetCode 1061. Lexicographically Smallest Equivalent String
原题链接在这里:https://leetcode.com/problems/lexicographically-smallest-equivalent-string/ 题目: Given string ...
LeetCode 230. Kth Smallest Element in a BST--C++,Python解法--面试真题--找二叉树中第K小的元素
题目地址:Kth Smallest Element in a BST - LeetCode Given a binary search tree, write a function kthSmalle ...
[leetcode] 230. Kth Smallest Element in a BST 找出二叉搜索树中的第k小的元素
题目大意 https://leetcode.com/problems/kth-smallest-element-in-a-bst/description/ 230. Kth Smallest Elem ...
leetcode 496, 503, 556. Next Greater Element I, II, III | 496, 503, 556. 下一个更大元素 I,II,III（单调栈）
496. Next Greater Element I https://leetcode.com/problems/next-greater-element-i/ 单调栈问题,参考:https://l ...
Java实现 LeetCode 744 寻找比目标字母大的最小字母（二分法）
744. 寻找比目标字母大的最小字母给定一个只包含小写字母的有序数组letters 和一个目标字母 target,寻找有序数组里面比目标字母大的最小字母. 在比较时,数组里字母的是循环有序的.举个例 ...
Leetcode——538. Convert BST to Greater Tree
题目原址 https://leetcode.com/problems/convert-bst-to-greater-tree/description/ 题目描述 Given a Binary Sear ...

LeetCode 744. Find Smallest Letter Greater Than Target

LeetCode 744. Find Smallest Letter Greater Than Target相关推荐

最新文章

热门文章