题目大意 现有一个天平,它有C个挂钩和G个砝码,问有多少种方法可以使得天平平衡(砝码必须用完) 题解 其实就是让背包容量为0的方法有多少种方法,但是这样的话背包容量会出现负数,所以可以平移一下,背包容量最大值为20*25*15=7500,即平移量为7500,最后答案就是dp[G][7500] 代码: #include<iostream> #include<cstring> #include<algorithm> using namespace std; #define…

Time Limit: 1000MS   Memory Limit: 30000K Total Submissions: 9163   Accepted: 5617 Description Gigel has a strange "balance" and he wants to poise it. Actually, the device is different from any other ordinary balance. It orders two arms of negli…

题目: http://poj.org/problem?id=1837 感觉dp的题目都很难做,这道题如果不看题解不知道憋到毕业能不能做出来,转化成了01背包问题,很神奇.. #include <stdio.h> #include <string.h> ][]; ], w[]; int main() { int n, m; scanf("%d %d", &n, &m); //天平上有n个砝码位置 ; i <= n; i++) { scanf(…

Q: dp 数组应该怎么设置? A: dp[i][j] 表示前 i 件物品放入天平后形成平衡度为 j 的方案数 题意: 有一个天平, 天平的两侧可以挂上重物, 给定 C 个钩子和G个秤砣. 2 4 -2 3 3 4 5 8 C = -2, G = 3, 那么 2*(3+4+5)=3*(8); 2*(4+8)=3*(3+5) 共有两种可行的方案, 那么结果就是2 Description Gigel has a strange "balance" and he wants to poise…

题目网址:http://acm.hdu.edu.cn/showproblem.php?pid=5616 题目: Jam's balance Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 1810    Accepted Submission(s): 754 Problem Description   Jim has a balance…

Jim has a balance and N weights. (1≤N≤20) The balance can only tell whether things on different side are the same weight. Weights can be put on left side or right side arbitrarily. Please tell whether the balance can measure an object of weight M. In…

Balance Time Limit: 1000 MS Memory Limit: 30000 KB 64-bit integer IO format: %I64d , %I64u Java class name: Main [Submit] [Status] [Discuss] Description Gigel has a strange "balance" and he wants to poise it. Actually, the device is different fr…

题意:过山车有n个区域,一个人有两个值F,D,在每个区域有两种选择: 1.睁眼: F += f[i], D += d[i] 2.闭眼: F = F ,     D -= K 问在D小于等于一定限度的时候最大的F. 解法: 用DP来做,如果定义dp[i][j]为前 i 个,D值为j的情况下最大的F的话,由于D值可能会增加到很大,所以是存不下的,又因为F每次最多增加20,那么1000次最多增加20000,所以开dp[1000][20000],dp[i][j]表示前 i 个,F值为j的情况下最小的D.…

Team Them Up! Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 7608   Accepted: 2041   Special Judge Description Your task is to divide a number of persons into two teams, in such a way, that: everyone belongs to one of the teams; every t…

传送门 Description Hasan and Bahosain want to buy a new video game, they want to share the expenses. Hasan has a set of N coins and Bahosain has a set of M coins. The video game costs W JDs. Find the number of ways in which they can pay exactly W JDs su…