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ID题目提交者结果用时内存语言文件大小提交时间测评时间
#623035#8795. Mysterious Sequencerns_rds#WA 1ms3936kbC++23833b2024-10-09 09:44:042024-10-09 09:44:05

Judging History

你现在查看的是最新测评结果

  • [2024-10-09 09:44:05]
  • 评测
  • 测评结果:WA
  • 用时:1ms
  • 内存:3936kb
  • [2024-10-09 09:44:04]
  • 提交

answer

#include <bits/stdc++.h>
using namespace std;

#define double long double

void solve() {
	const double inf = 1e9;
	const double ep = 1e-8;
	double a, b;
	cin >> a >> b;
	int n;
	cin >> n;
	double x, y;
	cin >> x >> y;
	double lo = -inf, hi = inf;
	auto calc = [&](double val) {
		double fi = x, se = val;
		for (int i = 3; i <= n; i++) {
			double tmp = a * fi + b * se;
			fi = se, se = tmp;
		}
		return se;
	};
	while (hi > lo + ep) {
		double mid = (hi + lo) / 2;
		if (calc(mid) < y) lo = mid;
		else hi = mid;
	}
	cout << setprecision(12) << fixed;
	cout << x << "\n";
	for (int i = 2; i < n; i++) {
		cout << lo << "\n";
		double tmp = a * x + b * lo;
		x = lo, lo = tmp;
	}
	cout << y << "\n";
}

int main() {
	ios::sync_with_stdio(false);
	cin.tie(nullptr);
	solve();
	return 0;
}

详细

Test #1:

score: 100
Accepted
time: 0ms
memory: 3828kb

input:

1.0 1.0 10 1 10

output:

1.000000000000
-0.323529418533
0.676470581467
0.352941162933
1.029411744400
1.382352907333
2.411764651734
3.794117559067
6.205882210801
10.000000000000

result:

ok 10 numbers

Test #2:

score: 0
Accepted
time: 1ms
memory: 3936kb

input:

1 1 2 1 100

output:

1.000000000000
100.000000000000

result:

ok 2 numbers

Test #3:

score: 0
Accepted
time: 0ms
memory: 3836kb

input:

1 1 5 50 100

output:

50.000000000000
-0.000000006939
49.999999993061
49.999999986122
100.000000000000

result:

ok 5 numbers

Test #4:

score: 0
Accepted
time: 1ms
memory: 3872kb

input:

0.25 0.25 10 1 1

output:

1.000000000000
55.875536475458
14.218884118865
17.523605148581
7.935622316861
6.364806866360
3.575107295805
2.484978540541
1.515021459087
1.000000000000

result:

ok 10 numbers

Test #5:

score: -100
Wrong Answer
time: 0ms
memory: 3936kb

input:

0.25 0.63 6 93 12

output:

93.000000000000
-2.196895158846
21.865956049927
13.226328521743
13.799075981180
12.000000000000

result:

wrong answer 2nd numbers differ - expected: '-14.2048080', found: '-2.1968952', error = '0.8453414'