codeforce 1091

本文提供了Codeforces竞赛中五个问题的算法解决方案,包括颜色球问题的最小化计算、坐标平均值求解、因子相关序列生成、规律查找及复杂序列生成等,深入探讨了算法设计与实现细节。

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题目连接:http://codeforces.com/contest/1091

A:

#include <bits/stdc++.h>
using namespace std;
int main() {
	int y, b, r;
	cin >> y >> b >> r;
	cout << min(y, min(b - 1, r - 2)) * 3 + 3 << endl;
	return 0;
}

B:

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
int main() {
	ll n, x = 0, y = 0, a = 0, b = 0;
	cin >> n;
	for (int i = 0; i < n * 2; i++) {
		cin >> x >> y;
		a += x;
		b += y;
	}
	cout << a / n << ' ' << b / n << endl;
	return 0;
}

C:

答案个数就是因子个数,然后计算以这个因子递增的所有数字。

#include <bits/stdc++.h>
using namespace std;
const int N = 1e5 + 9;
int main() {
	int n;
	cin >> n;
	vector<long long> p;
	for (int i = 1; i * i <= n; i++) {
		if (n % i == 0) {
			p.push_back(i);
			if (i * i != n)
			p.push_back(n / i);
		}
	}
	sort(p.begin(), p.end());
	for (int i = p.size() - 1; i >= 0; i--) {
		long long x = n / p[i], y = p[i];
		cout << (x - 1) * x / 2 * y + x;
		if (i == 0) {
			cout << endl;
		} else {
			cout << ' ';
		}
	}
	return 0;
}

D:

找规律

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
const int N = 1e6 + 9;
const int mod = 998244353;
ll f[N];
int main() {
	ll n;
	while (cin >> n) {
		f[1] = 1;
		f[2] = 2;
		ll tmp = 2;
		for (ll i = 3; i <= n; i++) {
			f[i] = (f[i - 1] + tmp - 1) % mod * i % mod;
			tmp = tmp * i % mod;
		}
		cout << f[n] << endl;
	}
	return 0;
}

E

 

F

 

G

 

### 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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