結果

問題 No.813 ユキちゃんの冒険
ユーザー te-shte-sh
提出日時 2021-06-17 11:17:54
言語 D
(dmd 2.109.1)
結果
AC  
実行時間 2 ms / 2,000 ms
コード長 2,719 bytes
コンパイル時間 2,441 ms
コンパイル使用メモリ 220,028 KB
実行使用メモリ 6,944 KB
最終ジャッジ日時 2024-06-22 11:33:08
合計ジャッジ時間 3,330 ms
ジャッジサーバーID
(参考情報)
judge4 / judge2
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ファイルパターン 結果
other AC * 26
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ソースコード

diff #
プレゼンテーションモードにする

// URL: https://yukicoder.me/problems/no/813
import std;
version(unittest) {} else
void main()
{
int N; io.getV(N);
double p; io.getV(p);
double q; io.getV(q);
if (p == 1) io.put!"{exit: true}"(1);
auto p1 = p, q1 = q;
foreach (i; 0..N-1) {
auto p2 = p1+(q1*q1*p)/(1-p1*p);
auto q2 = (q1*q)/(1-p1*p);
p1 = p2; q1 = q2;
}
io.put(p1);
}
auto io = IO!()();
struct IO(alias IN = stdin, alias OUT = stdout)
{
import core.stdc.stdlib : exit;
void getV(T...)(ref T v)
{
foreach (ref w; v) get(w);
}
void getA(T)(size_t n, ref T v)
if (hasAssignableElements!T)
{
v = new T(n);
foreach (ref w; v) get(w);
}
void getC(T...)(size_t n, ref T v)
if (allSatisfy!(hasAssignableElements, T))
{
foreach (ref w; v) w = new typeof(w)(n);
foreach (i; 0..n) foreach (ref w; v) get(w[i]);
}
void getM(T)(size_t r, size_t c, ref T v)
if (hasAssignableElements!T && hasAssignableElements!(ElementType!T))
{
v = new T(r);
foreach (ref w; v) getA(c, w);
}
template getS(E...)
{
void getS(T)(size_t n, ref T v)
{
v = new T(n);
foreach (ref w; v) foreach (e; E) mixin("get(w."~e~");");
}
}
const struct PutConf
{
bool newline = true, flush, exit;
string floatFormat = "%.10f", delimiter = " ";
}
void put(alias conf = "{}", T...)(T v)
{
putMain!conf(v);
}
void putB(alias conf = "{}", S, T)(bool c, S t, T f)
{
if (c) put!conf(t);
else put!conf(f);
}
void putRaw(T...)(T v)
{
OUT.write(v);
OUT.writeln;
}
private
{
dchar[] buf;
auto sp = (new dchar[](0)).splitter;
void nextLine()
{
IN.readln(buf);
sp = buf.splitter;
}
void get(T)(ref T v)
{
if (sp.empty) nextLine();
v = sp.front.to!T;
sp.popFront();
}
void putMain(alias conf, T...)(T v)
{
mixin("const PutConf c = "~conf~";");
foreach (i, w; v) {
putOne!conf(w);
if (i+1 < v.length) OUT.write(c.delimiter);
}
static if (c.newline) OUT.writeln;
static if (c.flush) OUT.flush();
static if (c.exit) exit(0);
}
void putOne(alias conf, T)(T v)
{
mixin("const PutConf c = "~conf~";");
static if (isInputRange!T && !isSomeString!T) putRange!conf(v);
else static if (isFloatingPoint!T) OUT.write(format(c.floatFormat, v));
else static if (hasMember!(T, "fprint")) v.fprint(OUT);
else OUT.write(v);
}
void putRange(alias conf, T)(T v)
{
mixin("const PutConf c = "~conf~";");
auto w = v;
while (!w.empty) {
putOne!conf(w.front); w.popFront();
if (!w.empty) OUT.write(c.delimiter);
}
}
}
}
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