193.Valid Phone Numbers - Leetcode题解

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7.Reverse Integer

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13.Roman to Integer

19.Remove Nth Node from End of List

20.Valid Parentheses

21.Merge Two Sorted Lists

22.Generate Parentheses

26.Remove Duplicates from Sorted Array

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28.Implement strStr()

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38.Count and Say

46.Permutations

53.Maximum Subarray

58.Length of Last Word

59.Spiral Matrix II

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77.Combinations

83.Remove Duplicates from Sorted List

88.Merge Sorted Array

104.Maximum Depth of Binary Tree

107.Binary Tree Level Order Traversal II

108.Convert Sorted Array to Binary Search Tree

101.Symmetric Tree

105.Construct Binary Tree from Preorder and Inorder Traversal

110.Balanced Binary Tree

111.Minimum Depth of Binary Tree

118.Pascals Triangle

119.Pascals Triangle II

121.Best Time to Buy and Sell Stock

125.Valid Palindrome

131.Palindrome Partitioning

140.Word Break II

141.Linked List Cycle

143.Reorder List

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171.Excel Sheet Column Number

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191.Number of 1 Bits

193.Valid Phone Numbers

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204.Count Primes

205.Isomorphic Strings

206.Reverse Linked List

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219.Contains Duplicate II

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226.Invert Binary Tree

231.Power of Two

232.Implement Queue Using Stack

234.Palindrome Linked List

237.Delete Node in a Linked List

240.Search a 2D Matrix II

242.Valid Anagram

257.Binary Tree Paths

263.Ugly Numbers

268.Missing Number

278.First Bad Version

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290.Word Pattern

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344.Reverse String

345.Reverse Vowels of a String

349.Intersection of Two Arrays

350.Intersection of Two Arrays II

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374.Guess Number Higher or Lower

383.Ransom Note

387.First Unique Character in a String

401.Binary Watch

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405.Convert A Number to Hexadecimal

409.Longest Palindrome

414.Third Maximum Number

415.Add Strings

427.Construct Quad Tree

429.N Ary Tree Level Order Traversal

434.Number of Segments in a String

437.Path Sum III

438.Find All Anagrams in a String

441.Arranging Coins

443.String Compression

447.Number of Boomerangs

448.Find All Numbers Disappeared in an Array

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538.Convert BST to Greater Tree

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543.Diameter of Binary Tree

551.Student Attendace Record I

557.Reverse Words in a String

558.Quad Tree Intersection

559.Maxmium Depth of N Ary Tree

561.Array Partition I

563.Binary Tree Tilt

566.Reshape the Matrix

572.Subtree of Another Tree

575.Distribute Candies

581.Shortest Unsorted Continuous Subarray

589.N Ary Tree Preorder Traversal

590.N Ary Tree Postorder Traversal

594.Longest Harmonious Subsequence

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637.Average of Levels in Binary Tree

643.Maximum Average Subarray I

645.Set Mismatch

653.Two Sum IV - Input is a BST

654.Maximum Binary Tree

657.Robot Return to Origin

661.Image Smoother

665.Non-Decreasing Array

669.Trim a Binary Search Tree

671.Second Minimum Node in a Binary Tree

680.Valid Palindrome II

682.Baseball Game

686.Repeated String Match

687.Longest Univalue Path

690.Employee Importance

693.Binary Number with Alternating Bits

696.Count Binary Substring

697.Degree of an Array

700.Search in a Binary Search Tree

701.Insert Into a Binary Search Tree

703.Kth Largest Element in a Stream

704.Binary Search

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706.Design Hashmap

707.Design Linked List

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717.1 Bit and 2 Bit Characters

720.Longest Word in Dictionary

724.Find Pivot Index

728.Self Dividing Numbers

739.每日温度

744.Find Smallest Letter Greater Than Target

746.Min Cost Climbing Stairs

747.Largest Number At Least Twice Of Others

748.Shortest Completing Word

754.Reach A Number

762.Prime Number of Set Bits in Binary Representation

766.Toeplitz Matrix

771.Jewels and Stones

783.Minimum Distance Between BST Nodes

784.Letter Case Permutation

788.Rotated Digits

796.Rotate String

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806.Number of Lines to Write String

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812.Largest Triangle Area

814.Binary Tree Pruning

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821.Shortest Distance to a Character

829.Consecutive Numbers Sum

830.Position of Large Groups

831.Masking Personal Information

832,Flipping an Image

833.Find And Replace in String

835,Image Overlap

836.Rectangle Overlap

840.Magic Squares In Grid

844.Backspace String Compare

848.Shifting Letters

849.Maximize Distance to Closest Person

852.Peak Index in A Mountain Array

859.Buddy Strings

860.Lemonade Change

861.Score After Flipping Matrix

864.Shortest Path to Get All Keys

865.Smallest Subtree with all the Deepest Nodes

866.Prime Palindrome

872.Leaf Similar Trees

874.Walking Robot Simulation

876.Middle of the Linked List

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893.Groups of Special Equivalent Strings

894.All Possible Full Binary Trees

896.monotonic array

897.increasing order search tree

900.RLE Iterator

901.Online Stock Span

905.Sort Array by Parity

908.Smallest Range I

910.Smallest Range II

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914.X of a Kind in a Deck of Cards

915.Partition Array into Disjoint Intervals

916.Word Subsets

917.Reverse Only Letters

922.Sort Array by Parity II

925.Long Pressed Name

929.Unique Email Address

937.Reorder Log Files

938.Range Sum of BST

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942.Di String Match

944.Delete Column to Make Sorted

949.Largest Time For Given Digits

950.Reveal Cards in Increasing Order

953.Verifying an Alien Dictionary

961.N Repeated Element in Size 2N Array

965.Univalued Binary Tree

970.Powerful Integers

974.Subarray Sums Divisible By K

976.Largest Perimeter Triangle

977.Squares of a Sorted Array

985.Sum of Even Numbers After Queries

989.Add to Array-Form of Integer

990.Satisfiability of Equality Equations

993.Cousins in Binary Tree

994.Rotting Oranges

997.Find the Town Judge

999.Available Captures for Rook

1002.Find Common Characters

1005.Maximise Sum of Array after K Negations

1008.Construct Binary Search Tree from Preorder Traversal

1021.Remove Outermost Parentheses

1025.Divisor Game

1029.Tow City Scheduling

1030.Matrix Cells in Distance Order

1033.Moving Stones Until Consecutive

1037.Valid Boomerang

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1282.用户分组

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1395.Count Number of Teams

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面试题 16.18

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193.Valid Phone Numbers

193.Valid Phone Numbers
难度:Easy
Given a text file file.txt that contains list of phone numbers (one per line), write a one liner bash script to print all valid phone numbers.
You may assume that a valid phone number must appear in one of the following two formats: (xxx) xxx-xxxx or xxx-xxx-xxxx. (x means a digit)
You may also assume each line in the text file must not contain leading or trailing white spaces.
Example:
​
Assume that file.txt has the following content:
​
987-123-4567
123 456 7890
(123) 456-7890
Your script should output the following valid phone numbers:
​
987-123-4567
(123) 456-7890
正则表达式：
# Read from the file file.txt and output all valid phone numbers to stdout.
cat file.txt | grep "^\(([0-9]\{3\}) \|^[0-9]\{3\}-\)[0-9]\{3\}-[0-9]\{4\}quot;
执行用时 :0 ms, 在所有 C++ 提交中击败了100.00%的用户
内存消耗 :3.1 MB, 在所有 C++ 提交中击败了52.82%的用户

191.Number of 1 Bits

Last modified 8mo ago

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