A valid e-mail has a prefix name and a domain where: The prefix name is a string that may containletters (upper or lower case),digits, underscore'_', period'.'and/or dash'-'. The prefix name muststart with a le
1394. Find Lucky Integer in an Array FindTabBarSize Given an array of integersarr, alucky integeris an integer that has a frequency in the array equal to its value. Returnthe largestlucky integerin the array. If there is nolucky integerreturn-1. Example 1: Input:arr = [2,2,3,4]Outp...
package leetcode func findDisappearedNumbers(nums []int) []int { res := []int{} for _, v := range nums { if v < 0 { v = -v } if nums[v-1] > 0 { nums[v-1] = -nums[v-1] } } for i, v := range nums { if v > 0 { res = append(res, i+1) } } return...
代码# Go packageleetcodefuncfindAnagrams(sstring,pstring)[]int{varfreq[256]intresult:=[]int{}iflen(s)==0||len(s)<len(p){returnresult}fori:=0;i<len(p);i++{freq[p[i]-'a']++}left,right,count:=0,0,len(p)forright<len(s){iffreq[s[right]-'a']>=1{count--}freq[s[right...
今天介绍的是LeetCode算法题中Easy级别的第262题(顺位题号是1160)。你会得到一个字符串单词数组和一个字符串chars。如果字符串可以由字符中的字符组成(每个字符只能使用一次),则该字符串是好的。返回所有好的字符串的长度之和。 例如: 输入:words = ["cat","bt","hat","tree"],chars ="atach" ...
Input: words = ["cat","bt","hat","tree"], chars = "atach" Output: 6 Explanation: The strings that can be formed are "cat" and "hat" so the answer is 3 + 3 = 6. Example 2: Input: words = ["hello","world","leetcode"], chars = "welldonehoneyr" Output: 10 Explanation...
private void frequency(Map<Character, Integer> common, String s) { for (int i = 0; i < s.length(); i++) { common.put(s.charAt(i), common.getOrDefault(s.charAt(i), 0) + 1); } } } 1. 2. 3. 4. 5. 6. 7. 8. ...
Find the minimum of frequency for each lowercase char in each of string. Time Complexity: O(n*m). n = A.length. m is average length of string in A. Space: O(1). AC Java: 1classSolution {2publicList<String>commonChars(String[] A) {3List<String> res =newArrayList<>();4if(A ...
LintCode Find the Weak Connected Component in the Directed Graph,原题链接在这里:http://www.lintcode.com/en/problem/find-the-weak-connected-component-in-the-directed-graph/题目:FindthenumberWeakConnectedComponentinth
技术标签: LeetCodeFind Lucky Integer in an Array (E) Given an array of integers arr, a lucky integer is an integer which has a frequency in the array equal to its value.Return a lucky integer in the array. If there are multiple lucky integers return the largest of them. If there is...