xbb0720的博客

（一）题面： Problem Description Chiaki has an array of n positive integers. You are told some facts about the array: for every two elements ai and aj in the subarray al..r (l≤i<j≤r), ai≠aj holds. Chia...

(一)题面： Problem Description Chiaki has n strings s1,s2,…,sn consisting of '(' and ')'. A string of this type is said to be balanced: + if it is the empty string + if A and B are balanced, AB is balan...

（一）题面： Problem Description Chiaki has a sequence A={a1,a2,…,an}. Let RMQ(A,l,r) be the minimum i (l≤i≤r) such that ai is the maximum value in al,al+1,…,ar. Two sequences A and B are called {RMQ Simi...

题目链接：HDU6135-Naive Operations （一）题面： Problem Description In a galaxy far, far away, there are two integer sequence a and b of length n. b is a static permutation of 1 to n. Initially a is filled wi...

题目链接：HDU6311-Cover （一）题面： Problem Description The Wall has down and the King in the north has to send his soldiers to sentinel. The North can be regard as a undirected graph (not necessary to be co...

题目链接：HDU-6356-Glad You Came （一）题面： Problem Description Steve has an integer array a of length n (1-based). He assigned all the elements as zero at the beginning. After that, he made m operations, e...

题目链接：HDU-6336-Harvest of Apples （一）题面： Problem Description There are n apples on a tree, numbered from 1 to n. Count the number of ways to pick at most m apples.   Input The first line of the in...