QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#779456 | #8795. Mysterious Sequence | woodie_0064# | WA | 0ms | 3964kb | C++20 | 966b | 2024-11-24 19:12:51 | 2024-11-24 19:12:55 |
Judging History
answer
#include <iostream>
#include <vector>
#include <algorithm>
#include <iomanip>
using namespace std;
using ld = long double;
const int N = 1e5 + 3;
int T;
int n, num;
void work(){
ld a, b, x1, xn;
cin >> a >> b >> n >> x1 >> xn;
if(n == 2){
cout << x1 << "\n" << xn;
return;
}
ld l = -2e9, r = 2e9, ans, x11, x2, x22, xi;
while(l < r){
x2 = (l + r) / 2;
x11 = x1, x22 = x2;
for(int i = 3; i <= n; ++i){
xi = a * x11 + b * x22;
x11 = x22, x22 = xi;
}
if(abs(xi - xn) < 1e-8){
break;
}else if(xi > xn) r = x2;
else l = x2;
}
cout << x1 << "\n" << x2 << "\n";
x11 = x1, x22 = x2;
for(int i = 3; i < n; ++i){
xi = a * x11 + b * x22;
x11 = x22, x22 = xi;
cout << xi << "\n";
}
cout << xn;
}
int main(){
// freopen("test.txt", "r", stdin);
ios::sync_with_stdio(false);
cin.tie(0);
cout << fixed << setprecision(10);
int T = 1;
while(T--){
work();
}
return 0;
}
Details
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Test #1:
score: 100
Accepted
time: 0ms
memory: 3964kb
input:
1.0 1.0 10 1 10
output:
1.0000000000 -0.3235294116 0.6764705884 0.3529411768 1.0294117652 1.3823529420 2.4117647072 3.7941176493 6.2058823565 10.0000000000
result:
ok 10 numbers
Test #2:
score: 0
Accepted
time: 0ms
memory: 3912kb
input:
1 1 2 1 100
output:
1.0000000000 100.0000000000
result:
ok 2 numbers
Test #3:
score: 0
Accepted
time: 0ms
memory: 3964kb
input:
1 1 5 50 100
output:
50.0000000000 0.0000000000 50.0000000000 50.0000000000 100.0000000000
result:
ok 5 numbers
Test #4:
score: 0
Accepted
time: 0ms
memory: 3864kb
input:
0.25 0.25 10 1 1
output:
1.0000000000 55.8755361979 14.2188840495 17.5236050618 7.9356222778 6.3648068349 3.5751072782 2.4849785283 1.5150214516 1.0000000000
result:
ok 10 numbers
Test #5:
score: -100
Wrong Answer
time: 0ms
memory: 3844kb
input:
0.25 0.63 6 93 12
output:
93.0000000000 -2.1968951658 21.8659560456 13.2263285173 13.7990759773 12.0000000000
result:
wrong answer 2nd numbers differ - expected: '-14.2048080', found: '-2.1968952', error = '0.8453414'