HDU 6092 Rikka with Subset（dp）

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HDU 6092 Rikka with Subset（dp）

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hdu 6092 Rikka with Subset（逆向01背包+思维）

Rikka with Subset Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 1122 Accepted Submission(s): 541 Problem Description As we know, Rikka is poor at math. Yuta is worrying about this situation…

2017 ACM暑期多校联合训练 - Team 5 1008 HDU 6092 Rikka with Subset （找规律）

题目链接 Problem Description As we know, Rikka is poor at math. Yuta is worrying about this situation, so he gives Rikka some math tasks to practice. There is one of them: Yuta has n positive A1−An and their sum is m. Then for each subset S of A, Yuta ca…

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题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=6092 #include <cstdio> #include <iostream> #include <cstring> using namespace std; ; int b[maxn] , dp[maxn] , n , m; int main() { int t; scanf("%d", &t); while(t--) { scanf(&qu…

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题意给定 $n$ 个数 $a_1,a_2,\cdots a_n$,对于每个 $K\in[1,n]$ ,求出 $n$ 个数的每个子集的前 $K$ 大数的和,输出每个值,对 $998244353$ 取模. $1\leq n \leq 10^5$ 思路设 $K$ 为 $k$ 时的答案为 $ans_k$ 有 \[ ans_k=\sum_{i=1}^na_i2^{n-i}\sum_{j=0}^{k-1}{i-1\choose j} \] $j$ 为在 \(a…

HDU 6092 17多校5 Rikka with Subset（dp+思维）

Problem Description As we know, Rikka is poor at math. Yuta is worrying about this situation, so he gives Rikka some math tasks to practice. There is one of them: Yuta has n positive A1−An and their sum is m. Then for each subset S of A, Yuta calcula…