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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
#540921#8795. Mysterious SequenceNanani#WA 0ms3920kbC++201.2kb2024-08-31 18:08:492024-08-31 18:08:50

Judging History

你现在查看的是最新测评结果

  • [2024-08-31 18:08:50]
  • 评测
  • 测评结果:WA
  • 用时:0ms
  • 内存:3920kb
  • [2024-08-31 18:08:49]
  • 提交

answer

//by 72
#include<bits/stdc++.h>
#define F(i, a, b) for(int i = a; i <= b; i ++)
#define Fd(i, a, b) for(int i = a; i >= b; i --)
#define pb push_back
#define pii pair<int, int>
#define fi first
#define se second
#define int long long
using namespace std;

const int mod = 998244353;
const int N = 2e5 + 10;
const int inf = 1e18;
typedef array<int, 3> a3; 
typedef long long ll;

int n;
double A, B, x1, xn;
const double eps = 1e-8;
double f[20];

double cal(double x) {
    f[1] = x1, f[2] = x;
    F(i, 3, n) f[i] = A * f[i - 1] + B * f[i - 2];
    return f[n];
}

void sol() {
    cout << fixed << setprecision(20);
    cin >> A >> B;
    cin >> n >> x1 >> xn;
    if(n == 2) {
        cout << x1 << "\n" << xn << "\n";
        return;
    }
    double l = -100, r = 100;
    while(r - l > eps) {
        double mid = (r + l) / 2;
        if(cal(mid) < xn) l = mid;
        else r = mid;
    }
    f[1] = x1, f[2] = l;
    F(i, 3, n) f[i] = A * f[i - 1] + B * f[i - 2];
    F(i, 1, n) cout << f[i] << "\n";
}

signed main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    int t = 1;
    F(i, 1, t) sol();
    return 0;
}
//sldl

详细

Test #1:

score: 100
Accepted
time: 0ms
memory: 3864kb

input:

1.0 1.0 10 1 10

output:

1.00000000000000000000
-0.32352941343560814857
0.67647058656439185143
0.35294117312878370285
1.02941175969317555428
1.38235293282195925713
2.41176469251513481140
3.79411762533709406853
6.20588231785222887993
9.99999994318932294846

result:

ok 10 numbers

Test #2:

score: 0
Accepted
time: 0ms
memory: 3812kb

input:

1 1 2 1 100

output:

1.00000000000000000000
100.00000000000000000000

result:

ok 2 numbers

Test #3:

score: 0
Accepted
time: 0ms
memory: 3804kb

input:

1 1 5 50 100

output:

50.00000000000000000000
-0.00000000582076609135
49.99999999417923390865
49.99999998835846781731
99.99999998253770172596

result:

ok 5 numbers

Test #4:

score: 0
Accepted
time: 0ms
memory: 3800kb

input:

0.25 0.25 10 1 1

output:

1.00000000000000000000
55.87553647928871214390
14.21888411982217803597
17.52360514977772254497
7.93562231739997514524
6.36480686679442442255
3.57510729604859989195
2.48497854071075607862
1.51502145918983899264
0.99999999997514876782

result:

ok 10 numbers

Test #5:

score: 0
Accepted
time: 0ms
memory: 3920kb

input:

0.25 0.63 6 93 12

output:

93.00000000000000000000
-14.20480796368792653084
55.03879800907802177790
4.81067048514611173005
35.87711036700568456581
11.99999999739347167349

result:

ok 6 numbers

Test #6:

score: 0
Accepted
time: 0ms
memory: 3860kb

input:

0.25 0.80 10 5 63

output:

5.00000000000000000000
78.76953618251718580723
23.69238404562929645181
68.93872495742107275873
36.18858847585870819330
64.19812708490154307128
45.00040255191235871735
62.60860230589932484691
51.65247261800472244886
62.99999999922064830571

result:

ok 10 numbers

Test #7:

score: 0
Accepted
time: 0ms
memory: 3816kb

input:

0.25 0.99 3 18 30

output:

18.00000000000000000000
48.71999999741092324257
29.99999999935273109486

result:

ok 3 numbers

Test #8:

score: 0
Accepted
time: 0ms
memory: 3812kb

input:

0.28 0.64 9 6 10

output:

6.00000000000000000000
20.95040334388613700867
9.70611293628811822032
16.12596976224780220832
10.72718381265378084777
13.32423211538165119805
10.59618263240528257541
11.49443969091773709579
9.99999999819634766141

result:

ok 9 numbers

Test #9:

score: -100
Wrong Answer
time: 0ms
memory: 3828kb

input:

0.31 0.40 7 10 49

output:

10.00000000000000000000
99.99999999417923390865
34.99999999819556251168
50.84999999711232021582
29.76349999838304682953
29.56668499834367480616
21.07107234883975976913

result:

wrong answer 2nd numbers differ - expected: '240.1150640', found: '100.0000000', error = '0.5835330'