Description Pattern lock security is generally used in Android handsets instead of a password. The pattern lock can be set by joining points on a 3 × 3 matrix in a chosen order. The points of the matrix are registered in a numbered order starting wit…
3861 - Valid Pattern Lock Time Limit:2000MS Memory Limit:65536KB 64bit IO Format:%lld & %llu Submit Status Practice ZOJ 3861 Description Pattern lock security is generally used in Android handsets instead of a password. The pattern lock can b…
Valid Pattern Lock Time Limit: 2 Seconds Memory Limit: 65536 KB Pattern lock security is generally used in Android handsets instead of a password. The pattern lock can be set by joining points on a 3 × 3 matrix in a chosen order. The points of t…
ZOJ Problem Set - 1025 题目分类:基础题 原题地址:http://acm.zju.edu.cn/onlinejudge/showProblem.do?problemCode=1025 题目大意就是有很多木头,都有各自的长度和重量.现在要加工这些木头,如果加工某根木头的长度和重量大于等于它上一根木头的长度和重量,那么加工它不需要时 间,否则要花1分钟.现给出一堆木头的长度和重量,要求加工完这堆木头可以花的最少时间.例如给出5根木头长度重量分别为(4,9), (5,2),…
称号:ZOJ Problem Set - 2563 Long Dominoes 题意:给出1*3的小矩形.求覆盖m*n的矩阵的最多的不同的方法数? 分析:有一道题目是1 * 2的.比較火.链接:这里 这个差点儿相同,就是当前行的状态对上一行有影响.对上上一行也有影响.所以 定义状态:dp[i][now][up]表示在第 i 行状态为now .上一行状态为 up 时的方案数. 然后转移方程:dp[i][now][up] = sum ( dp[i-1][up][uup] ) 前提是合法 合法性的推断…