686.Repeated String Match - Leetcode题解

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9.Palindrome Number

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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46.Permutations

53.Maximum Subarray

58.Length of Last Word

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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

167.Two Sum II- Input Array is Sorted

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169.Majority Element

171.Excel Sheet Column Number

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182.Duplicate Emails

183.Customers Who Never Order

189.Rotate Array

191.Number of 1 Bits

193.Valid Phone Numbers

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198.House Robber

202.Happy Number

203.Remove Linked List Elements

204.Count Primes

205.Isomorphic Strings

206.Reverse Linked List

217.Contains Duplicate

219.Contains Duplicate II

225.Implement Stack Using Queues

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

284.Peeking Iterator

290.Word Pattern

303.Range Sum Query Immutable

338.Counting Bits

342.Power of Four

344.Reverse String

345.Reverse Vowels of a String

349.Intersection of Two Arrays

350.Intersection of Two Arrays II

367.Valid Perfect Square

371.Sum of Two Integers

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

453.Minimum Moves to Equal Array Elements

455.Assign Cookies

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461.Hamming Distance

463.Island Perimeter

476.Number Complement

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485.Max Consecutive Ones

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532.K-diff Pairs in an Array

535.Encode and Decode TinyURL

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

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590.N Ary Tree Postorder Traversal

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645.Set Mismatch

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661.Image Smoother

665.Non-Decreasing Array

669.Trim a Binary Search Tree

671.Second Minimum Node in a Binary Tree

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686.Repeated String Match

687.Longest Univalue Path

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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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720.Longest Word in Dictionary

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746.Min Cost Climbing Stairs

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766.Toeplitz Matrix

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796.Rotate String

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814.Binary Tree Pruning

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829.Consecutive Numbers Sum

830.Position of Large Groups

831.Masking Personal Information

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833.Find And Replace in String

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836.Rectangle Overlap

840.Magic Squares In Grid

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859.Buddy Strings

860.Lemonade Change

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872.Leaf Similar Trees

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894.All Possible Full Binary Trees

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897.increasing order search tree

900.RLE Iterator

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910.Smallest Range II

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1395.Count Number of Teams

面试题 16.01

面试题 16.18

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686.Repeated String Match

686.Repeated String Match
难度:Easy
Given two strings A and B, find the minimum number of times A has to be repeated such that B is a substring of it. If no such solution, return -1.
For example, with A = "abcd" and B = "cdabcdab".
Return 3, because by repeating A three times (“abcdabcdabcd”), B is a substring of it; and B is not a substring of A repeated two times ("abcdabcd").
Note: The length of A and B will be between 1 and 10000.
可以将A循环补至长度大于B，然后判断B是否是增补的A的子集。 最后确定循环的A的次数。
1
class Solution {
2
public:
3
    int repeatedStringMatch(string A, string B) {
4
        int t= B.size()/A.size()+1;
5
        string tmp=A;
6
        while(t--)
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        {
8
            tmp+=A;
9
        }
10
        size_t start= tmp.find(B);
11
        if(start ==string::npos) return -1;
12
        int end=start+B.size()-1;
13
        if(end == start) return 1;
14
     //      cout<<start<<" "<< end << endl;
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        start = start/A.size() *A.size();
16
        end = ((end+1)/A.size()+((end+1)%A.size() !=0) ) *A.size();
17
       // cout<<start<<" "<< end << endl;
18
        return (end-start)/A.size();
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20
    }
21
    };
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682.Baseball Game

687.Longest Univalue Path

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