結果
問題 | No.813 ユキちゃんの冒険 |
ユーザー |
|
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 |
ソースコード
// URL: https://yukicoder.me/problems/no/813import std;version(unittest) {} elsevoid 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);}}}}