简单DP.dp[i][j]表示走到这格的最大金钱数. #include<cstdio> #include<cstring> #include<cmath> #include<algorithm> using namespace std; +; int n,m; int a[maxn][maxn],dp[maxn][maxn]; bool f(int a,int b) { &&a<=n&&b>=&&b…

Search gold Time Limit: 3000/1000MS (Java/Others)     Memory Limit: 65535/65535KB (Java/Others) Submit Status Dreams of finding lost treasure almost came true recently. A new machine called 'The Revealer' has been invented and it has been used to det…

方格取数. 但由于题意说金币数<0就死了,就不能继续转移. #include<cstdio> #include<algorithm> #include<cstring> using namespace std; int dx[]={0,1,1,2},dy[]={1,0,2,1}; int n,m,a[1010][1010],f[1010][1010]; int main(){ scanf("%d%d",&n,&m); for(i…

Search gold Time Limit: 1000MS   Memory Limit: 65535KB   64bit IO Format: %lld & %llu Submit Status Description Dreams of finding lost treasure almost came true recently. A new machine called 'The Revealer' has been invented and it has been used to d…

Final Pan's prime numbers 题目连接: http://acm.uestc.edu.cn/#/problem/show/1272 题意 给你n,要求你在[4,n]范围内找到一个最大的质数x,使得x-4和x+4也是质数 题解: 数学 只有7是满足的 为什么? 1.若 n = 3x,因为n>4,所以n必为合数,不符. 2.若 n = 3x + 1, 则 n - 4 = 3x - 3 = 3(x-1) ,即(n -4 ) % 3 == 0,有且只有n=7时满足 3.若 m = 3…

听说KPM初二暑假就补完了啊%%% 先刷Gold再刷Silver(因为目测没那么多时间刷Silver,方便以后TJ2333(雾 按AC数降序刷 ------------------------------------------------------------------------------------------------------- bzoj1597: [Usaco2008 Mar]土地购买  斜率优化DP h升序,w降序. f[i]=min(f[j]+h[i]*w[j+1])…

P1360 [USACO07MAR]黄金阵容均衡Gold Balanced L… 题目描述 Farmer John's N cows (1 ≤ N ≤ 100,000) share many similarities. In fact, FJ has been able to narrow down the list of features shared by his cows to a list of only K different features (1 ≤ K ≤ 30). For ex…

二叉树(Binary Tree)是最简单的树形数据结构,然而却十分精妙.其衍生出各种算法,以致于占据了数据结构的半壁江山.STL中大名顶顶的关联容器--集合(set).映射(map)便是使用二叉树实现.由于篇幅有限,此处仅作一般介绍(如果想要完全了解二叉树以及其衍生出的各种算法,恐怕要写8~10篇). 1)二叉树(Binary Tree) 顾名思义,就是一个节点分出两个节点,称其为左右子节点:每个子节点又可以分出两个子节点,这样递归分叉,其形状很像一颗倒着的树.二叉树限制了每个节点最多有两个子节…

题目链接:Recover Binary Search Tree | LeetCode OJ Two elements of a binary search tree (BST) are swapped by mistake. Recover the tree without changing its structure. Note: A solution using O(n) space is pretty straight forward. Could you devise a constan…

题目链接:Validate Binary Search Tree | LeetCode OJ Given a binary tree, determine if it is a valid binary search tree (BST). Assume a BST is defined as follows: The left subtree of a node contains only nodes with keys less than the node's key. The right…