The string "PAYPALISHIRING" is written in a zigzag pattern on a given number of rows like this: (you may want to display this pattern in a fixed font for better legibility) P A H N A P L S I I G Y I R And then read line by line: "PAHNAPLSII…

The string "PAYPALISHIRING" is written in a zigzag pattern on a given number of rows like this: (you may want to display this pattern in a fixed font for better legibility) P A H N A P L S I I G Y I R And then read line by line: "PAHNAPLSII…

The string "PAYPALISHIRING" is written in a zigzag pattern on a given number of rows like this: (you may want to display this pattern in a fixed font for better legibility) P A H N A P L S I I G Y I R And then read line by line: "PAHNAPLSII…

The string "PAYPALISHIRING" is written in a zigzag pattern on a given number of rows like this: (you may want to display this pattern in a fixed font for better legibility) P A H N A P L S I I G Y I R And then read line by line: "PAHNAPLSII…

［抄题］: Given two 1d vectors, implement an iterator to return their elements alternately. Example: Input: v1 = [1,2] v2 = [3,4,5,6] Output: [1,3,2,4,5,6] Explanation: By calling next repeatedly until hasNext returns false,   the order of elements retur…

class Solution { public: string convert(string s, int nRows) { if (nRows <= 1) return s; string res = ""; int size = 2 * nRows - 2; for (int i = 0; i < nRows; ++i) { for (int j = i; j < s.size(); j += size) { res += s[j]; int tmp = j +…

从上往下打印二叉树这个是不分行的,用一个队列就可以实现 class Solution { public: vector<int> PrintFromTopToBottom(TreeNode* root) { vector<int> result; queue<TreeNode* > container; if(root == NULL) return result; container.push(root); ){ TreeNode* rot = container.f…

问题:给定 n 行和 m 列的二维数组矩阵.如图所示,以 ZIG-ZAG 方式打印此矩阵. 从对称的角度来看,通过反复施加滑行反射可以从简单的图案如线段产生规则的之字形. 主要思想:算法从(0, 0)位置开始水平向右遍历,当到达(0, 1)时沿着反对角线方向左下遍历(利用一个变量控制左下右上方向),内层循环一直遍历到碰到边缘时row++,方向改为右上,沿着反对角线碰到矩阵上边缘时col++,方向变为左下遍历,知道上半部分(包括反对角线遍历完):遍历完半个矩阵(可能是子方矩阵)后,根据当前 row…

题目: 矩阵的之字型遍历 给你一个包含 m x n 个元素的矩阵 (m 行, n 列), 求该矩阵的之字型遍历. 样例 对于如下矩阵: [ [1, 2, 3, 4], [5, 6, 7, 8], [9,10, 11, 12] ] 返回 [1, 2, 5, 9, 6, 3, 4, 7, 10, 11, 8, 12] 解题: 感觉很简单,就是没有搞出来,程序来源 ,这里是先右上走,我换成先横着走就是不对了,表示不理解.另外一种方法,表示也不理解. java程序: public class Solut…

Medium! 题目描述: 将字符串 "PAYPALISHIRING" 以Z字形排列成给定的行数:(下面这样的形状) P A H N A P L S I I G Y I R 之后按逐行顺序依次排列:"PAHNAPLSIIGYIR" 实现一个将字符串进行指定行数的转换的函数: string convert(string text, int nRows); convert("PAYPALISHIRING", 3) 应当返回 "PAHNAPL…