假设你是harry potter,在grid的左上角,你现在要走到右下角,grid中有正数也有负数,遇到正数表示你的strength增加那么多,遇到负数表示strength减少那么多,在任何时刻如果你的strength小于等于0,那么你就挂了.在一开始你有一定的初始的strength,现在问这个初始的strength最少是多少,才能保证你能够找到一条路走到右下角.每一步只能向右或者向下. http://www.mitbbs.com/article_t1/JobHunting/32611137_0…

怎么构造呢? \(首先我们不可能去构造一个2000*2000的矩阵,那太复杂了\) \(也许我们可以看看2*2的矩阵??\) \[\left[ \begin{matrix} x&y\\ z&q\\ \end{matrix} \right] \] \(但是在这个矩阵中,小明的算法不可能出错.因为到达y和z的值固定,取个最大值一定是对的.\) \(那就2*3的矩阵\) \[\left[ \begin{matrix} x&y&z\\ q&w&e \end{matr…

Given a matrix of m x n elements (m rows, n columns), return all elements of the matrix in ZigZag-order. Have you met this question in a real interview? Yes Example Given a matrix: [ [1, 2, 3, 4], [5, 6, 7, 8], [9,10, 11, 12] ] return [1, 2, 5, 9, 6,…

Matrix Zigzag Traversal Given a matrix of m x n elements (m rows, ncolumns), return all elements of the matrix in ZigZag-order. Have you met this question in a real interview? Yes Example Given a matrix: [ [1, 2, 3, 4], [5, 6, 7, 8], [9,10, 11, 12] ]…

题解-比赛CF1332 比赛CF1332 [A] [B] [C] [D] [E] [F] [G] [A]Exercising Walk Exercising Walk \(T\) 组测试数据,每次给定 \(a,b,c,d,x,y,x_1,y_1,x_2,y_2\).起点是 \((x,y)\),要左走 \(a\) 步,右走 \(b\) 步,下走 \(c\) 步,上走 \(d\) 步(这题的 \(x\) 和 \(y\) 轴与平时相反).求是否有走法,使得走的过程中总是满足 \(x_1\le x\le…

题目链接:https://codeforces.com/contest/1332 A. Exercising Walk 可走的最远距离:左:x-x1,右:x2-x,下:y-y1,上:y2-y 如果可以移动,通过折返行走,两个相对方向至少有一个可以消为0,然后看余下步数是否小于等于该方向可走的最远距离,类似于一种模拟的做法,好多大佬都是直接结论QAQ. #include <bits/stdc++.h> using namespace std; void solve() { int a,b,c,d…

March 16, 2016 Problem statement:Given a 2D array (matrix) named M, print all items of M in a spiral order, clockwise.For example: M  =  1   2   3   4   5       6   7   8   9  10      11  12  13  14  15      16  17  18  19  20 The clockwise spiral pr…

题目链接:Matrix Walk 题意:设有一个N×M的矩阵,矩阵每个格子都有从1-n×m的一个特定的数,具体数的排列如图所示.假设一个人每次只能在这个矩阵上的四个方向移动一格(上下左右),给出一条移动的轨迹上的数字,求出满足这个人移动轨迹的一格矩阵的N和M. 题解:首先可以确定的是左右移动的话,相邻格子之间数字相差的绝对值一定是1,而向上或向下移动的数字只差的绝对值一定相等.按照这个思路,判断给出的轨迹相邻格子之间的差值,看是否差值的绝对值只有1和另外一个数字就可以基本解决问题了.但是这里还要…

Educational Codeforces Round 40 (Rated for Div. 2) C. Matrix Walk time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output There is a matrix A of size x × y filled with integers. For every , *A**i, …

题意: 就是给出一连串的数字 这些数字是从第一个数字依次走过的 emm..就是这样..  然后让你判断这个矩阵是否存在  如果存在输出行和列的数量  其中行..开到最大就好了...主要是判断列 在输入的这些数中  如果出现一个数字和上一个不是连续的数字  则就能判断列了 y = abs(a[i] - a[i-1])  然后如果再有不连续的 判断一下是否符合  abs(a[i] - a[i-1])= y  如果不符合 则NO  当然还有两个坑,,,1.可能a[i] == a[i-1]这样也是NO…

题目大意 考虑一个 $x\times y$ 的矩阵 $A_{x\times y}$ ,$A_{i,j} = (i-1)x+y$ . 从矩阵中的某个位置出发,每次可向上下左右移动一步,每到一个位置,记录下此位置上的数,如此可得到一个序列. 现给定序列 $a_1, a_2, \dots, a_n$,判断是否存在 $x,y$ 使得在 $A_{x,y}$ 中移动能得到此序列. 解法 考察 $|a_{i+1} - a_{i}|$,显然有 $|a_{i+1} - a_i| = 1$ 或 $|a_{i+1}…

Find the kth smallest number in at row and column sorted matrix. Have you met this question in a real interview? Yes Example Given k = 4 and a matrix: [ [1 ,5 ,7], [3 ,7 ,8], [4 ,8 ,9], ] return 5 Challenge O(k log n), n is the maximal number in widt…

作者:Glowin链接:https://zhuanlan.zhihu.com/p/22881223来源:知乎著作权归作者所有.商业转载请联系作者获得授权,非商业转载请注明出处. 原文地址:Google Interview University 原文作者:John Washam 译文出自:掘金翻译计划 (翻译不易,欢迎 Star 支持) 译者:Aleen,Newton,bobmayuze,Jaeger,sqrthree 这是? 这是我为了从 web 开发者(自学.非计算机科学学位)蜕变至 Goog…

Recruit Coupon Purchase Winner's Interview: 2nd place, Halla Yang Recruit Ponpare is Japan's leading joint coupon site, offering huge discounts on everything from hot yoga, to gourmet sushi, to a summer concert bonanza. The Recruit Coupon Purchase Pr…

Stealing Harry Potter's Precious Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Problem Description Harry Potter has some precious. For example, his invisible robe, his wand and his owl. When Hogwarts school is in…

Write an efficient algorithm that searches for a value in an n x m table (two-dimensional array). This table is sorted along the rows and columns — that is, Table[i][j] ≤ Table[i][j + 1], Table[i][j] ≤ Table[i + 1][j] Solution: 1. STEP 方法: Start in t…

Amazon interview question: Given a 2-dimensional array with arbitrary sizes and contains random positive values, you are required to move from the first element [0][0] to the last element [n][n] using the path which will yield the maximum sum of all…

Write an efficient algorithm that searches for a value in an m x n matrix, return the occurrence of it. This matrix has the following properties: Integers in each row are sorted from left to right. Integers in each column are sorted from up to bottom…

1.Tell me about yourself? My name is xxx,i 'm from xxx. now , I am a postgratuation and my major subject is computer application. I worked at shanghai kinglong Internet of things company last year,I got a lot of innovate knowledge from my work about…

注意--你可能会爆内存-- 假设一个直接爆搜索词-- 队列存储器元件被减少到-- #include<iostream> #include<map> #include<string> #include<cstring> #include<cstdio> #include<cstdlib> #include<cmath> #include<queue> #include<vector> #include…

crack the coding interview answer c++ 1.1 #ifndef __Question_1_1_h__  #define __Question_1_1_h__  #include <string>  using std::string;  class Question1_1   {  public:  int run();  bool isUniqueChars(const string& str);  bool isUniqueChars2(cons…

Stealing Harry Potter's Precious Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 126    Accepted Submission(s): 63 Problem Description Harry Potter has some precious. For example, his invisible…

Random Walk Time Limit: 5000/2000 MS (Java/Others)    Memory Limit: 65535/65536 K (Java/Others)Total Submission(s): 81    Accepted Submission(s): 35 Problem Description Yuanfang is walking on a chain. The chain has n nodes numbered from 1 to n. Every…

Description Harry Potter has some precious. For example, his invisible robe, his wand and his owl. When Hogwarts school is in holiday, Harry Potter has to go back to uncle Vernon's home. But he can't bring his precious with him. As you know, uncle Ve…

摘自 https://blog.csdn.net/beiyangdashu/article/details/49300479 和 https://en.wikipedia.org/wiki/Laplacian_matrix 定义 给定一个由n个顶点的简单图G,它的拉普拉斯矩阵定义为: L = D - A,其中,D是该图G度的矩阵,A为图G的邻接矩阵. 因为G是一个简单图,A只包含0,1,并且它的对角元素均为0. L中的元素给定为: 其中deg(vi) 表示顶点 i 的度. 对称归一化的拉普拉斯…

Problem Description Harry Potter has some precious. For example, his invisible robe, his wand and his owl. When Hogwarts school is in holiday, Harry Potter has to go back to uncle Vernon's home. But he can't bring his precious with him. As you know,…

Stealing Harry Potter's Precious Problem Description Harry Potter has some precious. For example, his invisible robe, his wand and his owl. When Hogwarts school is in holiday, Harry Potter has to go back to uncle Vernon's home. But he can't bring his…

书名:Harry Potter and the Goblet of Fire  作者:J.K. Rowling 篇幅: 752页 蓝思值:880L 用时:    17天 工具:  有道词典 [透析成果] 这是我读完的第5本英文原著,用词典查了198个单词. 速度有明显提升.大幅降低.如今基本4.5页查一个生词. 以下是全部单词: 1, intrigue  ['ɪn'triɡ] n. 阴谋:诡计.复杂的事:私通  vt. 用诡计取得:激起...的兴趣  vi. 私通.密谋 2, riddle  […

On a 2 dimensional grid with R rows and C columns, we start at (r0, c0) facing east. Here, the north-west corner of the grid is at the first row and column, and the south-east corner of the grid is at the last row and column. Now, we walk in a clockw…

原题链接在这里:https://leetcode.com/problems/spiral-matrix-iii/ 题目: On a 2 dimensional grid with R rows and C columns, we start at (r0, c0) facing east. Here, the north-west corner of the grid is at the first row and column, and the south-east corner of the…