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…

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…

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…

题意:给出一个数,把他拆成2^n和的形式,问有多少种拆法 链接:点我 对6进行分析 1 1 1 1 1 1 1 1 1 1 2 1 1 2 2 1 1 4 2 2 4 2 4 对最上面4个,显然是由4的拆分然后每个加+1 +1得到的 最下面是由,2的拆分乘2得到的 设a[n]为和为 n 的种类数: 根据题目可知,加数为2的N次方,即 n 为奇数时等于它前一个数 n-1 的种类数 a[n-1] ,若 n 为偶数时分加数中有无 1 讨论,即关键是对 n 为偶数时进行讨论: 1.n为奇数,a[n]=a…

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…

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…

HDU 模拟题, 枚举1002 1004 1013 1015 1017 1020 1022 1029 1031 1033 1034 1035 1036 1037 1039 1042 1047 1048 1049 1050 1057 1062 1063 1064 1070 1073 1075 1082 1083 1084 1088 1106 1107 1113 1117 1119 1128 1129 1144 1148 1157 1161 1170 1172 1177 1197 1200 1201…

转载来自:http://www.cppblog.com/acronix/archive/2010/09/24/127536.aspx 分类一: 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…