摘要：题目链接：http://acm.hust.edu.cn/vjudge/contest/121396#problem/F 题意：这个题与那个数组三角形的题差不多，只不过是多了一个倒三角而已； 分析：需要注意的是定义一个怎样的状态，根据这个状态写出状态转移方程 状态转移方程： dp[i][j]=max( 阅读全文

摘要：Description “Point, point, life of student!” This is a ballad（歌谣）well known in colleges, and you must care about your score in this exam too. How many 阅读全文

摘要：Problem Description 某国为了防御敌国的导弹袭击,发展出一种导弹拦截系统.但是这种导弹拦截系统有一个缺陷:虽然它的第一发炮弹能够到达任意的高度,但是以后每一发炮弹都不能超过前一发的高度.某天,雷达捕捉到敌国的导弹来袭.由于该系统还在试用阶段,所以只有一套系统,因此有可能不能拦截所有 阅读全文

摘要：Description A subsequence of a given sequence is the given sequence with some elements (possible none) left out. Given a sequence X = <x1, x2, ..., xm 阅读全文

摘要：Description Nowadays, a kind of chess game called “Super Jumping! Jumping! Jumping!” is very popular in HDU. Maybe you are a good boy, and know little 阅读全文

摘要：Description Given a sequence a[1],a[2],a[3]......a[n], your job is to calculate the max sum of a sub-sequence. For example, given (6,-1,5,4,-7), the m 阅读全文

摘要：Description Whuacmers use coins.They have coins of value A1,A2,A3...An Silverland dollar. One day Hibix opened purse and found there were some coins. 阅读全文

摘要：Description 对于吃货来说，过年最幸福的事就是吃了，没有之一！ 但是对于女生来说，卡路里（热量）是天敌啊！ 资深美女湫湫深谙“胖来如山倒，胖去如抽丝”的道理，所以她希望你能帮忙制定一个食谱，能使她吃得开心的同时，不会制造太多的天敌。 当然，为了方便你制作食谱，湫湫给了你每日食物清单，上面描 阅读全文