zoukankan      html  css  js  c++  java
  • 832. Flipping an Image

    Given a binary matrix A, we want to flip the image horizontally, then invert it, and return the resulting image. To flip an image horizontally means that each row of the image is reversed.  For example, flipping [1, 1, 0] horizontally results in [0, 1, 1]. To invert an image means that each 0 is replaced by 1, and each 1 is replaced by 0. For example, inverting [0, 1, 1] results in [1, 0, 0]. Example 1:
    Input: [[1,1,0],[1,0,1],[0,0,0]]
    Output: [[1,0,0],[0,1,0],[1,1,1]]
    Explanation: First reverse each row: [[0,1,1],[1,0,1],[0,0,0]].
    Then, invert the image: [[1,0,0],[0,1,0],[1,1,1]]
    Example 2:
    Input: [[1,1,0,0],[1,0,0,1],[0,1,1,1],[1,0,1,0]]
    Output: [[1,1,0,0],[0,1,1,0],[0,0,0,1],[1,0,1,0]]
    Explanation: First reverse each row: [[0,0,1,1],[1,0,0,1],[1,1,1,0],[0,1,0,1]].
    Then invert the image: [[1,1,0,0],[0,1,1,0],[0,0,0,1],[1,0,1,0]]
    Notes:
    • 1 <= A.length = A[0].length <= 20
    • 0 <= A[i][j] <= 1
    题解:
    class Solution {
        public int[][] flipAndInvertImage(int[][] A) {
            int m = A.length;
            int n = A[0].length;
            int[][] B = new int[m][n];
    
            for (int i = 0; i < m; i++)
                for (int j = 0; j < n; j++){
                    B[i][j] = 1-A[i][n-1-j];
                }
                return B;
        }
    }
     
  • 相关阅读:
    跳表实现
    剑指OFFER24-反转链表
    java常用的明文加密算法
    创建 Java 第三方类库,以及制作类库的Javadoc
    java 中的正则表达式
    JDK、JRE、JVM 关系
    java 编译运行过程
    为什么要配置环境变量
    搭建 java 开发环境
    idea 设置
  • 原文地址:https://www.cnblogs.com/ZoHy/p/12400649.html
Copyright © 2011-2022 走看看