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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
#497521#8795. Mysterious Sequencelulujia5454#WA 0ms3880kbC++201.1kb2024-07-29 12:33:322024-07-29 12:33:32

Judging History

你现在查看的是最新测评结果

  • [2024-07-29 12:33:32]
  • 评测
  • 测评结果:WA
  • 用时:0ms
  • 内存:3880kb
  • [2024-07-29 12:33:32]
  • 提交

answer

#include <bits/stdc++.h>
using namespace std;
typedef long long LL;
typedef unsigned long long ull;
typedef pair<int, int> PII;
#define mem(trie, a) memset((trie), (a), sizeof(trie))
const int N = 1e2 + 10;
double a[N], b[N];
int n;
double aa, bb;
int check(double x)
{
    b[1] = a[1];
    b[2] = x;
    for (int i = 3; i <= n; i++)
    {
        b[i] = b[i - 2] * aa + b[i - 1] * bb;
    }
    return b[n] > a[n];
}
void solve()
{

    cin >> aa >> bb >> n;
    cin >> a[1] >> a[n];
    double l = -1e5, r = 1e5;
    while (fabs(r - l) > 1e-9)
    {
        double mid = (l + r) / 2;
        if (check(mid))
            r = mid;
        else
            l = mid;
    }
    b[1] = a[1];
    b[2] = l;
    for (int i = 3; i <= n; i++)
    {
        b[i] = b[i - 2] * aa + b[i - 1] * bb;
    }
    for (int i = 1; i <= n; i++)
    {
        cout <<fixed<<setprecision(6)<< b[i] << endl;
    }
}
signed main()
{
    ios::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    int t = 1;
    // cin >> t;
    while (t--)
        solve();
    return 0;
}

详细

Test #1:

score: 100
Accepted
time: 0ms
memory: 3880kb

input:

1.0 1.0 10 1 10

output:

1.000000
-0.323529
0.676471
0.352941
1.029412
1.382353
2.411765
3.794118
6.205882
10.000000

result:

ok 10 numbers

Test #2:

score: 0
Accepted
time: 0ms
memory: 3880kb

input:

1 1 2 1 100

output:

1.000000
100.000000

result:

ok 2 numbers

Test #3:

score: 0
Accepted
time: 0ms
memory: 3876kb

input:

1 1 5 50 100

output:

50.000000
0.000000
50.000000
50.000000
100.000000

result:

ok 5 numbers

Test #4:

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

input:

0.25 0.25 10 1 1

output:

1.000000
55.875536
14.218884
17.523605
7.935622
6.364807
3.575107
2.484979
1.515021
1.000000

result:

ok 10 numbers

Test #5:

score: -100
Wrong Answer
time: 0ms
memory: 3860kb

input:

0.25 0.63 6 93 12

output:

93.000000
-2.196895
21.865956
13.226329
13.799076
12.000000

result:

wrong answer 2nd numbers differ - expected: '-14.2048080', found: '-2.1968950', error = '0.8453415'