codeforce789A

本文介绍了一个比赛编程题目解决方案,通过三个计数器统计大于和小于给定阈值k的元素,并利用排序和取余操作来计算最终答案。文章提供了一段C++代码实现,详细展示了如何处理数据以达到最优解。

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/*哇比赛时候vj炸了,去codeforce交题就有一种万分期待的感觉虽然题不难直接1A但是心里还是很舒服啊*/

/*这个题的思路是通过三个计数器计数,将大于k的与小于k的分为两组并统计数量cnt1,cnt2,还有一个总的计数器cnt计最终答案,通过对2*k取余各种操作完成详情看代码*/

#include <iostream>
#include <cstdio>
#include <cstring>
#include <algorithm>
using namespace std;
const int maxn = 1e5+10;
int num[maxn];
bool cmp (int a, int b){
	return a > b;
}
int main()
{
	int n, k;
	while(scanf("%d%d", &n, &k) != EOF){
		memset(num, 0, sizeof(num));
		int cnt_s = 0;
		int cnt_b = 0;
		int cnt = 0;
		for(int i = 0 ; i < n; i++){
			scanf("%d", &num[i]);
			if(num[i] <= k) cnt_s++;
		}
		cnt_b = n - cnt_s;
		sort(num, num+n, cmp);
		for(int i = 0 ;i < cnt_b; i++){
			if(num[i] % (2*k) == 0) cnt = cnt + num[i]/(2*k);
			else{
				if(num[i]%(2*k) > k) cnt = cnt + (num[i]/(2*k) + 1);
				if(num[i]%(2*k) <= k) {cnt = cnt + (num[i]/(2*k)); cnt_s++;}   //主要是这里的cnt_s++,意思是这种情况将余的部分当做小于k的并++
			}	
		}
		//cout << cnt_s;
		if(cnt_s%2 == 0) cnt = cnt + cnt_s/2;
		else cnt = cnt + cnt_s/2 + 1;
		cout << cnt << endl;
	}
	return 0;
}


### Codeforces Problem or Contest 998 Information For the specific details on Codeforces problem or contest numbered 998, direct references were not provided within the available citations. However, based on similar structures observed in other contests such as those described where configurations often include constraints like `n` representing numbers of elements with defined ranges[^1], it can be inferred that contest or problem 998 would follow a comparable format. Typically, each Codeforces contest includes several problems labeled from A to F or beyond depending on the round size. Each problem comes with its own set of rules, input/output formats, and constraint descriptions. For instance, some problems specify conditions involving integer inputs for calculations or logical deductions, while others might involve more complex algorithms or data processing tasks[^3]. To find detailed information regarding contest or problem 998 specifically: - Visit the official Codeforces website. - Navigate through past contests until reaching contest 998. - Review individual problem statements under this contest for precise requirements and examples. Additionally, competitive programming platforms usually provide comprehensive documentation alongside community discussions which serve valuable resources when exploring particular challenges or learning algorithmic solutions[^2]. ```cpp // Example C++ code snippet demonstrating how contestants interact with input/output during competitions #include <iostream> using namespace std; int main() { int n; cin >> n; // Process according to problem statement specifics } ```
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