Change the ball Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 593    Accepted Submission(s): 207 Problem Description Garfield has three piles of balls, each pile has unique color of following:…

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=2277 Change the ball Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 694    Accepted Submission(s): 272 Problem Description Garfield has three pile…

Change the ball Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 552    Accepted Submission(s): 193 Problem Description Garfield has three piles of balls, each pile has unique color of following:…

题目传送门 /* 找规律/数位DP:我做的时候差一点做出来了,只是不知道最后的 is_one () http://www.cnblogs.com/crazyapple/p/3315436.html 数位DP:http://blog.csdn.net/libin56842/article/details/11580497 */ #include <cstdio> #include <iostream> #include <algorithm> #include <c…

Problem Description Now given two kinds of coins A and B,which satisfy that GCD(A,B)=1.Here you can assume that there are enough coins for both kinds.Please calculate the maximal value that you cannot pay and the total number that you cannot pay. Inp…

题目链接: http://codeforces.com/problemset/problem/353/D?mobile=true H. Queue time limit per test 1 secondmemory limit per test 256 megabytes 问题描述 There are n schoolchildren, boys and girls, lined up in the school canteen in front of the bun stall. The b…

Couple doubi 题目链接: http://acm.hust.edu.cn/vjudge/contest/121334#problem/D Description DouBiXp has a girlfriend named DouBiNan.One day they felt very boring and decided to play some games. The rule of this game is as following. There are k balls on th…

Couple doubi Time Limit:1000MS     Memory Limit:32768KB     64bit IO Format:%I64d & %I64u Submit Status Practice HDU 4861 Description DouBiXp has a girlfriend named DouBiNan.One day they felt very boring and decided to play some games. The rule of th…

Swap There is a sequence of numbers of length nn, and each number in the sequence is different. There are two operations: Swap the first half and the last half of the sequence (if nn is odd, the middle number does not change) Swap all the numbers in…

传送门 这道题的题意就是给你n个数让你在每个数之间插入+.-.*三种运算符中的一种,然后算出一个答案,再把答案加起来. 这题肯定是不能暴力的(题目都告诉你了由3n-1种结果).我们先从小的情况枚举找一找规律. n=1 a1 n=2 2*a1+a1*a2 n=3 6*a1+2*a1*a2+a1*a2*a3 n=4 18*a1+6*a1*a2+2a1*a2*a3+a1*a2*a3*a4 发现没有?每一项是一个前缀积,每一项的系数除了最后两项都是后一项*3.这样我们就可以拿线段树维护这个答案了. 每次…