Farmer John commanded his cows to search for different sets of numbers that sum to a given number. The cows use only numbers that are an integer power of 2. Here are the possible sets of numbers that sum to 7: 1) 1+1+1+1+1+1+1 2) 1+1+1+1+1+2 3) 1+1+1…

Sumsets http://acm.hdu.edu.cn/showproblem.php?pid=2709 Problem Description Farmer John commanded his cows to search for different sets of numbers that sum to a given number. The cows use only numbers that are an integer power of 2. Here are the possi…

Sumsets Time Limit: 6000/2000 MS (Java/Others)     Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 2159     Accepted Submission(s): 875 Problem Description Farmer John commanded his cows to search for different sets of numbers that sum…

Sumsets Time Limit: 6000/2000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 3968    Accepted Submission(s): 1578 Problem Description Farmer John commanded his cows to search for different sets of numbers that sum t…

题目链接 http://acm.hdu.edu.cn/showproblem.php?pid=2709 题意 给出一个数N 要求有多少种方式 求和 能够等于N 加的数 必须是 2的幂次 思路 首先可以想到的是 如果 N 是奇数的话 那么 到达N 的方法数 就是 到达 N - 1 的方法数 因为就相当于 把 所有到达N-1 的方法数 都再 + 1 如果 N 是偶数的话 就有两种情况 0.分解的数字中至少有两个1 那么 dp[n] = 1 + 1 + dp[n - 2] 1.分解的数字中没有1 也就…

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=2709 Problem Description Farmer John commanded his cows to search for different sets of numbers that sum to a given number. The cows use only numbers that are an integer power of 2. Here are the possible…

转载:from http://blog.csdn.net/qq_28236309/article/details/47818349 基础题:1000.1001.1004.1005.1008.1012.1013.1014.1017.1019.1021.1028.1029. 1032.1037.1040.1048.1056.1058.1061.1070.1076.1089.1090.1091.1092.1093. 1094.1095.1096.1097.1098.1106.1108.1157.116…

Saving HDU Time Limit: 3000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 7194    Accepted Submission(s): 3345 Problem Description 话说上回讲到海东集团面临内外交困,公司的元老也只剩下XHD夫妇二人了.显然,作为多年拼搏的商人,XHD不会坐以待毙的.  一天,当他正在苦思冥想解困良策的…

http://acm.hdu.edu.cn/showproblem.php?pid=3037 Lucas定理模板. 现在才写,noip滚粗前兆QAQ #include<cstdio> #include<cstring> #include<algorithm> using namespace std; typedef long long ll; int jc[100003]; int p; int ipow(int x, int b) { ll t = 1, w = x;…

http://acm.hdu.edu.cn/showproblem.php?pid=4859 题目大意: 在一个矩形周围都是海,这个矩形中有陆地,深海和浅海.浅海是可以填成陆地的. 求最多有多少条方格线满足两侧分别是海洋和陆地 这道题很神 首先考虑一下,什么情况下能够对答案做出贡献 就是相邻的两块不一样的时候 这样我们可以建立最小割模型,可是都说是最小割了 无法求出最大的不相同的东西 所以我们考虑转化,用总的配对数目 - 最小的相同的对数 至于最小的相同的对数怎么算呢? 我们考虑这样的构造方法:…