結果

問題 No.498 ワープクリスタル (給料日編)
コンテスト
ユーザー te-sh
提出日時 2017-12-25 11:55:45
言語 D
(dmd 2.109.1)
結果
CE  
(最新)
AC  
(最初)
実行時間 -
コード長 4,264 bytes
コンパイル時間 438 ms
コンパイル使用メモリ 131,680 KB
最終ジャッジ日時 2024-11-14 20:18:04
合計ジャッジ時間 987 ms
ジャッジサーバーID
（参考情報） 		judge2 / judge4
このコードへのチャレンジ
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コンパイルエラー時のメッセージ・ソースコードは、提出者また管理者しか表示できないようにしております。（リジャッジ後のコンパイルエラーは公開されます）
ただし、clay言語の場合は開発者のデバッグのため、公開されます。

コンパイルメッセージ
/home/linuxbrew/.linuxbrew/opt/dmd/include/dlang/dmd/std/format/internal/write.d(143): Error: cannot implicitly convert expression `obj` of type `const(FactorRing!(1000000007, false))` to `int`
/home/linuxbrew/.linuxbrew/opt/dmd/include/dlang/dmd/std/format/write.d(1239): Error: template instance `std.format.internal.write.formatValueImpl!(LockingTextWriter, FactorRing!(1000000007, false), char)` error instantiating
/home/linuxbrew/.linuxbrew/opt/dmd/include/dlang/dmd/std/format/write.d(632):        instantiated from here: `formatValue!(LockingTextWriter, FactorRing!(1000000007, false), char)`
/home/linuxbrew/.linuxbrew/opt/dmd/include/dlang/dmd/std/stdio.d(1759):        instantiated from here: `formattedWrite!(LockingTextWriter, char, FactorRing!(1000000007, false))`
/home/linuxbrew/.linuxbrew/opt/dmd/include/dlang/dmd/std/stdio.d(4277):        instantiated from here: `write!(FactorRing!(1000000007, false), char)`
Main.d(44):        instantiated from here: `writeln!(FactorRing!(1000000007, false))`

ソースコード

diff # 

import std.algorithm, std.conv, std.range, std.stdio, std.string;

const mod = 10^^9+7;
alias mint = FactorRing!mod;
alias point = Point!int;

void main()
{
  auto rd = readln.split.to!(int[]), g = point(rd[0], rd[1]), k = rd[2];
  auto p = new point[](k), n = new int[](k);
  foreach (i; 0..k) {
    auto rd2 = readln.split.to!(int[]);
    p[i] = point(rd2[0], rd2[1]);
    n[i] = rd2[2];
  }
  auto ns = n.sum;

  auto fact = new mint[](ns+1);
  fact[0] = 1;
  foreach (i; 1..ns+1) fact[i] = fact[i-1]*i;
  auto invFact = new mint[](ns+1);
  invFact[ns] = fact[ns].inv;
  foreach_reverse (i; 1..ns+1) invFact[i-1] = invFact[i]*i;

  auto ans = mint(0);

  void calc(int[] m)
  {
    if (m.length < k) {
      foreach (i; 0..n[m.length]+1)
        calc(m ~ i);
    } else {
      auto q = point(0, 0);
      foreach (i; 0..k) q = q + p[i] * m[i];
      if (q == g) {
        auto r = fact[m.sum];
        foreach (i; 0..k) r *= invFact[m[i]];
        ans += r;
      }
    }
  }

  calc([]);
  writeln(ans);
}

struct Point(T)
{
  T x, y;
  pure auto opBinary(string op: "+")(Point!T rhs) const { return Point!T(x + rhs.x, y + rhs.y); }
  pure auto opBinary(string op: "-")(Point!T rhs) const { return Point!T(x - rhs.x, y - rhs.y); }
  pure auto opBinary(string op: "*")(Point!T rhs) const { return x * rhs.x + y * rhs.y; }
  pure auto opBinary(string op: "*")(T a) const { return Point!T(x * a, y * a); }
  pure auto opBinary(string op: "/")(T a) const { return Point!T(x / a, y / a); }
  pure auto hypot2() const { return x ^^ 2 + y ^^ 2; }
}

struct FactorRing(int m, bool pos = false)
{
  version(BigEndian) {
    union { long vl; struct { int vi2; int vi; } }
  } else {
    union { long vl; int vi; }
  }

  static init() { return FactorRing!(m, pos)(0); }

  @property int toInt() { return vi; }
  alias toInt this;

  this(int v) { vi = v; }
  this(int v, bool runMod) { vi = runMod ? mod(v) : v; }
  this(long v) { vi = mod(v); }

  ref FactorRing!(m, pos) opAssign(int v) { vi = v; return this; }

  pure auto mod(int v) const
  {
    static if (pos) return v % m;
    else return (v % m + m) % m;
  }

  pure auto mod(long v) const
  {
    static if (pos) return cast(int)(v % m);
    else return cast(int)((v % m + m) % m);
  }

  static if (!pos) {
    pure auto opUnary(string op: "-")() const { return FactorRing!(m, pos)(mod(-vi)); }
  }

  static if (m < int.max / 2) {
    pure auto opBinary(string op: "+")(int rhs) const { return FactorRing!(m, pos)(mod(vi + rhs)); }
    pure auto opBinary(string op: "-")(int rhs) const { return FactorRing!(m, pos)(mod(vi - rhs)); }
  } else {
    pure auto opBinary(string op: "+")(int rhs) const { return FactorRing!(m, pos)(mod(vl + rhs)); }
    pure auto opBinary(string op: "-")(int rhs) const { return FactorRing!(m, pos)(mod(vl - rhs)); }
  }
  pure auto opBinary(string op: "*")(int rhs) const { return FactorRing!(m, pos)(mod(vl * rhs)); }

  pure auto opBinary(string op)(FactorRing!(m, pos) rhs) const
    if (op == "+" || op == "-" || op == "*") { return opBinary!op(rhs.vi); }

  static if (m < int.max / 2) {
    auto opOpAssign(string op: "+")(int rhs) { vi = mod(vi + rhs); }
    auto opOpAssign(string op: "-")(int rhs) { vi = mod(vi - rhs); }
  } else {
    auto opOpAssign(string op: "+")(int rhs) { vi = mod(vl + rhs); }
    auto opOpAssign(string op: "-")(int rhs) { vi = mod(vl - rhs); }
  }
  auto opOpAssign(string op: "*")(int rhs) { vi = mod(vl * rhs); }

  auto opOpAssign(string op)(FactorRing!(m, pos) rhs)
    if (op == "+" || op == "-" || op == "*") { return opOpAssign!op(rhs.vi); }

  pure auto opBinary(string op: "/")(FactorRing!(m, pos) rhs) { return FactorRing!(m, pos)(mod(vl * rhs.inv.vi)); }
  pure auto opBinary(string op: "/")(int rhs) { return opBinary!op(FactorRing!(m, pos)(rhs)); }
  auto opOpAssign(string op: "/")(FactorRing!(m, pos) rhs) { vi = mod(vl * rhs.inv.vi); }
  auto opOpAssign(string op: "/")(int rhs) { return opOpAssign!op(FactorRing!(m, pos)(rhs)); }

  pure auto inv() const
  {
    int x = vi, a, b;
    exEuclid(x, m, a, b);
    return FactorRing!(m, pos)(mod(a));
  }
}

pure T exEuclid(T)(T a, T b, ref T x, ref T y)
{
  auto g = a;
  x = 1;
  y = 0;
  if (b != 0) {
    g = exEuclid(b, a % b, y, x);
    y -= a / b * x;
  }
  return g;
}
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