結果
| 問題 |
No.764 浮動点
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2018-12-12 17:35:26 |
| 言語 | D (dmd 2.109.1) |
| 結果 |
TLE
|
| 実行時間 | - |
| コード長 | 2,592 bytes |
| コンパイル時間 | 2,812 ms |
| コンパイル使用メモリ | 156,712 KB |
| 実行使用メモリ | 13,884 KB |
| 最終ジャッジ日時 | 2024-06-13 02:18:53 |
| 合計ジャッジ時間 | 5,755 ms |
|
ジャッジサーバーID (参考情報) |
judge5 / judge2 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 1 TLE * 1 -- * 1 |
| other | -- * 23 |
ソースコード
import std.algorithm, std.container, std.conv, std.math, std.range, std.typecons, std.stdio, std.string;
auto rdsp(){return readln.splitter;}
void pick(R,T)(ref R r,ref T t){t=r.front.to!T;r.popFront;}
void readV(T...)(ref T t){auto r=rdsp;foreach(ref v;t)pick(r,v);}
void readC(T...)(size_t n,ref T t){foreach(ref v;t)v=new typeof(v)(n);foreach(i;0..n){auto r=rdsp;foreach(ref v;t)pick(r,v[i]);}}
void main()
{
int n; readV(n);
double[] l; readC(n+2, l);
auto l0 = l[0], lc = l.cumulativeSum;
auto ll = new double[](n+2), lr = new double[](n+2);
ll[1] = l[1];
foreach (i; 2..n+2) ll[i] = max(ll[i-1], l[i]);
lr[n+1] = l[n+1];
foreach_reverse (i; 1..n+1) lr[i] = max(lr[i+1], l[i]);
writeln(0);
foreach (i; 2..n) {
auto a = lc[1..i+1], b = max(2*ll[i]-a, 0);
auto c = lc[i+1..$], d = max(2*lr[i+1]-c, 0);
auto a2 = a^^2, b2 = b^^2, c2 = c^^2, d2 = d^^2;
double f(double x)
{
auto ay = 0.0L, by = 0.0L, cy = 0.0L, dy = 0.0L;
if (-a < x && x < a) ay = a2-x^^2;
if (-b < x && x < b) by = b2-x^^2;
if (l0-c < x && x < l0+c) cy = c2-(x-l0)^^2;
if (l0-d < x && x < l0+d) dy = d2-(x-l0)^^2;
return max(0.0L, min(ay, cy).sqrt-max(by, dy).sqrt);
}
writefln("%.7f", integrateDE((x) => f(x), -a, l0+c, 1e-6)*2);
}
writeln(0);
}
class CumulativeSum(T)
{
size_t n;
T[] s;
this(T[] a)
{
n = a.length;
s = new T[](n+1);
s[0] = T(0);
foreach (i; 0..n) s[i+1] = s[i] + a[i];
}
T opSlice(size_t l, size_t r) { return s[r]-s[l]; }
size_t opDollar() { return n; }
}
auto cumulativeSum(T)(T[] a) { return new CumulativeSum!T(a); }
double integrateDE(double delegate(double) f, double a, double b, double eps = 1e-8)
{
import std.math;
const auto c = asin(1.0), tm = 10.0;
double delegate(double) x, g;
if (!a.isInfinity && !b.isInfinity) {
x = (double t) => (b+a)/2 + (b-a)/2*tanh(c*sinh(t));
g = (double t) => c*(b-a)/2*cosh(t)/cosh(c*sinh(t))^^2;
} else if (!a.isInfinity) {
x = (double t) => a + exp(c*sinh(t));
g = (double t) => c*cosh(t)*exp(c*sinh(t));
} else if (!b.isInfinity) {
x = (double t) => b - exp(c*sinh(-t));
g = (double t) => c*cosh(t)*exp(c*sinh(-t));
} else {
x = (double t) => sinh(c*sinh(t));
g = (double t) => c*cosh(t)*cosh(c*sinh(t));
}
auto s = 0.0, h = 1.0/c;
auto cnt = 0;
for (;;) {
auto i = 0.0;
for (auto t = 0.0; t < tm; t = t > 0 ? -t : -t+h) {
auto di = f(x(t)) * g(t) * h;
if (!di.isNaN) i += di;
}
if (abs(i-s) < abs(i)*eps) return i;
s = i;
h /= 2;
}
}