結果

問題 No.13 囲みたい！
コンテスト
ユーザー te-sh
提出日時 2020-02-18 16:21:45
言語 D
(dmd 2.109.1)
結果
AC  
実行時間 9 ms / 5,000 ms
コード長 5,407 bytes
コンパイル時間 828 ms
コンパイル使用メモリ 116,296 KB
実行使用メモリ 6,944 KB
最終ジャッジ日時 2024-06-22 05:16:10
合計ジャッジ時間 1,342 ms
ジャッジサーバーID
（参考情報） 		judge1 / judge4
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ファイルパターン 結果
other AC * 16
権限があれば一括ダウンロードができます
コンパイルメッセージ
Main.d(147): Deprecation: function `Main.IO!(makeGlobal, makeGlobal).IO.put!("{exit: true}", string).put.putMain!(c, string).putMain` function requires a dual-context, which is deprecated
Main.d-mixin-135(135):        instantiated from here: `putMain!(c, string)`
Main.d(31):        instantiated from here: `put!("{exit: true}", string)`
Main.d(147): Deprecation: function `Main.IO!(makeGlobal, makeGlobal).IO.put!("{}", string).put.putMain!(c, string).putMain` function requires a dual-context, which is deprecated
Main.d-mixin-135(135):        instantiated from here: `putMain!(c, string)`
Main.d(33):        instantiated from here: `put!("{}", string)`

ソースコード

diff # 

// URL: https://yukicoder.me/problems/no/13

import std.algorithm, std.array, std.container, std.math, std.range, std.typecons, std.string;

version(unittest) {} else
void main()
{
  int W, H; io.getV(W, H);
  int[][] M; io.getM(H, W, M);

  alias rg = Region!(H, W);
  auto g = rg.grid(M), v = rg.grid!bool;

  auto hasCycle(rg.Pos p)
  {
    struct Pos2 { rg.Pos curr, prev; }
    auto q = DList!Pos2(Pos2(p, p)); v[p] = true;

    while (!q.empty) {
      auto e = q.front; q.removeFront();
      foreach (d; e.curr.around4.filter!(d => d != e.prev && g[d] == g[p])) {
	if (v[d]) return true;
	q.insertBack(Pos2(d, e.curr)); v[d] = true;
      }
    }

    return false;
  }

  foreach (p; g.walk)
    if (!v[p] && hasCycle(p)) io.put!"{exit: true}"("possible");

  io.put("impossible");
}

template Region(alias h, alias w)
{
  struct Pos
  {
    int r, c;
    pure this(int r, int c) { this.r = r; this.c = c; }
    pure bool inRegion() { return 0 <= r && r < h && 0 <= c && c < w; }
    pure int p2i() { return cast(int)w*r+c; }

    pure Pos opBinary(string op)(Pos q) if (op=="+"||op=="-")
    { return mixin("Pos(r"~op~"q.r, c"~op~"q.c)"); }
    Pos opOpAssign(string op)(Pos q) if (op=="+"||op=="-")
    { mixin("r"~op~"=q.r; c"~op~"=q.c;"); return this; }
    pure Pos opBinary(string op, U)(U a) if (op=="*"||op=="/")
    { return mixin("Pos(r"~op~"a, c"~op~"a)"); }
    Pos opOpAssign(string op, U)(U a) if (op=="*"||op=="/")
    { mixin("r"~op~"=a; c"~op~"=a;"); return this; }
    pure int opBinary(string op: "*")(Pos q)
    { return r*q.r+c*q.c; }

    pure auto around4()
    {
      return [Pos(r-1, c), Pos(r, c+1), Pos(r+1, c), Pos(r, c-1)]
        .filter!(p => p.inRegion);
    }
    pure auto around8()
    {
      return [Pos(r-1, c), Pos(r-1, c+1), Pos(r, c+1), Pos(r+1, c+1),
              Pos(r+1, c), Pos(r+1, c-1), Pos(r, c-1), Pos(r-1, c-1)]
        .filter!(p => p.inRegion);
    }
  }

  struct Grid(T)
  {
    T[][] data;
    pure this(T[][] data) { this.data = data; }
    pure Grid!T dup() { return Grid!T(data.map!"a.dup".array); }

    pure T opIndex(size_t r, size_t c) { return data[r][c]; }
    pure T opIndex(Pos p) { return data[p.r][p.c]; }
    Grid!T opIndexAssign(T v, size_t r, size_t c) { data[r][c] = v; return this; }
    Grid!T opIndexAssign(T v, Pos p) { data[p.r][p.c] = v; return this; }
    Grid!T opIndexOpAssign(string op)(T v, size_t r, size_t c)
    { mixin("data[r][c]"~op~"=v;"); return this; }
    Grid!T opIndexOpAssign(string op)(T v, Pos p)
    { mixin("data[p.r][p.c]"~op~"=v;"); return this; }
    Grid!T opIndexUnary(string op)(size_t r, size_t c) if (op=="++"||op=="--")
      { mixin(op~"data[r][c];"); return this; }
    Grid!T opIndexUnary(string op)(Pos p) if (op=="++"||op=="--")
      { mixin(op~"data[p.r][p.c];"); return this; }

    auto walk() { return WalkRange(this); }

    private struct WalkRange
    {
      int r, c;
      this(Grid!T g) { r = 0; c = 0; }
      @property pure Pos front() { return Pos(r, c); }
      void popFront() { if (++c >= w) { c = 0; ++r; } }
      pure bool empty() { return r >= h; }
    }
  }

  pure Pos pos(int r, int c) { return Pos(r, c); }
  pure Grid!T grid(T)(T[][] data = new T[][](h, w)) { return Grid!T(data); }
}

auto io = IO!()();
import std.stdio;
struct IO(alias IN = stdin, alias OUT = stdout)
{
  import std.conv, std.format, std.meta, std.traits, core.stdc.stdlib;

  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); }
  template getS(E...)
  {
    auto 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 = " ";
  }

  auto put(alias conf = "{}", T...)(T v)
  { mixin("const PutConf c = "~conf~"; putMain!c(v);"); }
  auto putB(alias conf = "{}", S, T)(bool c, S t, T f)
  { if (c) put!conf(t); else put!conf(f); }
  auto 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; }
    auto get(T)(ref T v) { if (sp.empty) nextLine(); v = sp.front.to!T; sp.popFront(); }

    auto putMain(PutConf c, T...)(T v)
    {
      foreach (i, w; v) {
        putOne!c(w);
        if (i < v.length-1) OUT.write(c.delimiter);
      }
      static if (c.newline) OUT.writeln;
      static if (c.flush) OUT.flush();
      static if (c.exit) exit(0);
    }
    auto putOne(PutConf c, T)(T v)
    {
      static if (isInputRange!T && !isSomeString!T) putRange!c(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);
    }
    auto putRange(PutConf c, T)(T v)
    {
      auto w = v;
      while (!w.empty) {
        putOne!c(w.front); w.popFront();
        if (!w.empty) OUT.write(c.delimiter);
      }
    }
  }
}
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