結果
| 問題 |
No.7 プライムナンバーゲーム
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2020-01-17 01:44:44 |
| 言語 | D (dmd 2.109.1) |
| 結果 |
AC
|
| 実行時間 | 18 ms / 5,000 ms |
| コード長 | 4,457 bytes |
| コンパイル時間 | 2,481 ms |
| コンパイル使用メモリ | 172,904 KB |
| 実行使用メモリ | 6,944 KB |
| 最終ジャッジ日時 | 2024-06-22 04:09:41 |
| 合計ジャッジ時間 | 3,390 ms |
|
ジャッジサーバーID (参考情報) |
judge1 / judge5 |
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| ファイルパターン | 結果 |
|---|---|
| other | AC * 17 |
ソースコード
// URL: https://yukicoder.me/problems/no/7
import std.algorithm, std.container, std.math, std.range, std.typecons, std.string;
version(unittest) {} else
void main()
{
int N; io.getV(N);
auto primes = Prime(N), b = new bool[](N+1);
b[0] = b[1] = true;
foreach (i; 2..N+1)
b[i] = !primes.primes.assumeSorted.lowerBound(i+1).map!(p => b[i-p]).all;
io.putB(b[N], "Win", "Lose");
}
struct Prime
{
import std.algorithm, std.bitmanip, std.math, std.range, std.typecons;
alias Factor = Tuple!(int, int);
int n;
int[] primes;
alias primes this;
this(int n)
{
this.n = n;
auto sieve = BitArray();
sieve.length((n+1)/2);
sieve = ~sieve;
foreach (p; 1..(n.isqrt-1)/2+1)
if (sieve[p])
for (auto q = p*3+1; q < (n+1)/2; q += p*2+1)
sieve[q] = false;
primes = sieve.bitsSet.map!(p => cast(int)p*2+1).array;
primes[0] = 2;
}
pure Factor[] div(int x) in { assert(x > 0 && x.isqrt <= n); } do
{
Factor[] factors;
auto t = isqrt(x);
foreach (p; primes) {
if (p > t) {
factors ~= Factor(x, 1);
break;
}
auto c = 0;
for (; x%p == 0; x /= p) ++c;
if (c > 0) factors ~= Factor(p, c);
if (x == 1) break;
}
return factors;
}
pure int[] divisors(int x) in { assert(x > 0 && x.isqrt <= n); } do
{
auto factors = div(x);
auto r = divisorsProc(factors, 0, 1);
r.sort();
return r;
}
private:
pure int[] divisorsProc(Factor[] factors, int i, int c)
{
if (i == factors.length) return [c];
int[] r;
foreach (j; 0..factors[i][1]+1)
r ~= divisorsProc(factors, i+1, c*factors[i][0]^^j);
return r;
}
}
pure T isqrt(T)(T n)
{
import std.algorithm, std.range, std.typecons;
static if (is(T == int)) auto max = 46340;
else static if (is(T == long)) auto max = 3037000499L;
if (n == T.max) return max;
auto bs = iota(T(0), max).map!(x => tuple(x, x^^2)).assumeSorted!"a[1]<b[1]";
return bs.lowerBound(tuple(0, n+1)).back[0];
}
pure T icbrt(T)(T n)
{
import std.stdio;
import std.algorithm, std.range, std.typecons;
static if (is(T == int)) auto max = 1290;
else static if (is(T == long)) auto max = 2097151L;
if (n == T.max) return max;
auto bs = iota(T(0), max).map!(x => tuple(x, x^^3)).assumeSorted!"a[1]<b[1]";
return bs.lowerBound(tuple(0, n+1)).back[0];
}
pure T powr(alias pred = "a*b", T, U)(T a, U n, T one)
{
import std.functional;
alias predFun = binaryFun!pred;
if (n == 0) return one;
auto r = one;
for (; n > 0; n >>= 1) {
if (n&1) r = predFun(r, a);
a = predFun(a, a);
}
return r;
}
pure T powr(alias pred = "a*b", T, U)(T a, U n) { return powr!(pred, T, U)(a, n, T(1)); }
pure T extGcd(T)(T a, T b, out T x, out T y)
{
auto g = a; x = 1; y = 0;
if (b) {
g = extGcd(b, a%b, y, x);
y -= a/b*x;
}
return g;
}
auto io = IO();
struct IO
{
import std.algorithm, std.conv, std.format, std.meta, std.range, std.stdio, std.traits;
dchar[] buf;
auto sp = (new dchar[](0)).splitter;
int precision = 10;
string delimiter = " ";
void nextLine()
{
stdin.readln(buf);
sp = buf.splitter;
}
auto get(T)(ref T v)
{
if (sp.empty) nextLine();
v = sp.front.to!T;
sp.popFront();
}
auto getV(T...)(ref T v)
{
foreach (ref w; v) get(w);
}
auto getA(T)(size_t n, ref T v)
if (hasAssignableElements!T)
{
v = new T(n);
foreach (ref w; v) get(w);
}
auto 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]);
}
auto 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);
}
auto rangePop(R)(ref R r)
{
r.popFront();
if (!r.empty) write(delimiter);
}
auto putA(T)(T v)
{
static if (isInputRange!T && !isSomeString!T)
for (auto w = v; !w.empty; rangePop(w)) putA(w.front);
else if (isFloatingPoint!T)
writef(format("%%.%df", precision), v);
else
write(v);
}
auto put(T...)(T v)
{
foreach (i, w; v) {
putA(w);
if (i < v.length-1) write(delimiter);
}
writeln;
}
auto putB(S, T)(bool c, S t, T f)
{
if (c)
put(t);
else
put(f);
}
auto dbg(T...)(T v)
{
stderr.writeln(v);
}
}