[CodeForces158D]Ice Sculptures[暴力]

本文深入解析 CodeForces158D 'IceSculptures' 题目,提供了一种通过暴力遍历寻找最优解的方法。详细解释了题目的核心概念、解题思路,并通过具体代码展示了如何实现解决方案。适合初学者了解算法应用与优化策略。

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题目链接:[CodeForces158D]Ice Sculptures[暴力]

题意分析:Berland大学周年庆,有N个冰雕等距地站成一个圈,每个冰雕都有自己的价值,现在你可以融化掉其中的一些,但必须使得剩余的冰雕围城的是正多边形,冰雕不可移动,问:怎么样做可以使得冰雕的价值总和最大,最大是多少?

解题思路:题目给出了3s的时间限制,而冰雕有20000个,可以暴力着对每个答案进行遍历。

个人感受:没想过暴力前,真不知道这题该怎么做。。。。。

具体代码如下:

#include <iostream>
#include <cstdio>
using namespace std;
const int MAXN = 2e4 + 111;

int t[MAXN];

int main() {
    int ans = 0;
    int n; scanf("%d", &n);
    for (int i = 1; i <= n; ++i)
    {
        scanf("%d", &t[i]);
        ans += t[i];  //让ans初始为总和
    }
    for (int i = 2; i <= n / 3; ++i) //至少要留下3个雕像,可暴力的范围就缩小了三倍
    {
        if (n % i == 0) //当可以删除雕像后得到正多边形时
        {
            for (int k = 1; k <= i; ++k) //考虑从第k个开始等间隔融化雕像
            {
                int tem = 0;
                for (int j = k; j <= n; j += i)
                    tem += t[j];
                if (tem > ans)
                    ans = tem;
            }
        }
    }
    printf("%d\n", ans);
    return 0;
}

### Codeforces 1487D Problem Solution The problem described involves determining the maximum amount of a product that can be created from given quantities of ingredients under an idealized production process. For this specific case on Codeforces with problem number 1487D, while direct details about this exact question are not provided here, similar problems often involve resource allocation or limiting reagent type calculations. For instance, when faced with such constraints-based questions where multiple resources contribute to producing one unit of output but at different ratios, finding the bottleneck becomes crucial. In another context related to crafting items using various materials, it was determined that the formula `min(a[0],a[1],a[2]/2,a[3]/7,a[4]/4)` could represent how these limits interact[^1]. However, applying this directly without knowing specifics like what each array element represents in relation to the actual requirements for creating "philosophical stones" as mentioned would require adjustments based upon the precise conditions outlined within 1487D itself. To solve or discuss solutions effectively regarding Codeforces' challenge numbered 1487D: - Carefully read through all aspects presented by the contest organizers. - Identify which ingredient or component acts as the primary constraint towards achieving full capacity utilization. - Implement logic reflecting those relationships accurately; typically involving loops, conditionals, and possibly dynamic programming depending on complexity level required beyond simple minimum value determination across adjusted inputs. ```cpp #include <iostream> #include <vector> using namespace std; int main() { int n; cin >> n; vector<long long> a(n); for(int i=0;i<n;++i){ cin>>a[i]; } // Assuming indices correspond appropriately per problem statement's ratio requirement cout << min({a[0], a[1], a[2]/2LL, a[3]/7LL, a[4]/4LL}) << endl; } ``` --related questions-- 1. How does identifying bottlenecks help optimize algorithms solving constrained optimization problems? 2. What strategies should contestants adopt when translating mathematical formulas into code during competitive coding events? 3. Can you explain why understanding input-output relations is critical before implementing any algorithmic approach? 4. In what ways do prefix-suffix-middle frameworks enhance model training efficiency outside of just tokenization improvements? 5. Why might adjusting sample proportions specifically benefit models designed for tasks requiring both strong linguistic comprehension alongside logical reasoning skills?
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