結果
| 問題 |
No.402 最も海から遠い場所
|
| ユーザー |
|
| 提出日時 | 2017-08-21 16:31:13 |
| 言語 | D (dmd 2.109.1) |
| 結果 |
TLE
|
| 実行時間 | - |
| コード長 | 3,097 bytes |
| コンパイル時間 | 835 ms |
| コンパイル使用メモリ | 128,792 KB |
| 実行使用メモリ | 323,644 KB |
| 最終ジャッジ日時 | 2024-06-12 21:42:36 |
| 合計ジャッジ時間 | 9,435 ms |
|
ジャッジサーバーID (参考情報) |
judge4 / judge3 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 15 TLE * 1 -- * 3 |
ソースコード
import std.algorithm, std.conv, std.range, std.stdio, std.string;
import std.container; // SList, DList, BinaryHeap
alias Point!int point;
alias Grid!(int, int) igrid;
alias Grid!(bool, int) bgrid;
void main()
{
auto rd = readln.split.to!(int[]), h = rd[0]+2, w = rd[1]+2;
auto s = new string[](h);
s[0] = s[$-1] = '.'.repeat(w).array;
foreach (r; 1..h-1) s[r] = "." ~ readln.chomp ~ ".";
struct Qitem { point p; int len; }
auto q = DList!Qitem();
auto g = igrid(h, w), v = bgrid(h, w);
foreach (r; 0..h)
foreach (c; 0..w)
if (s[r][c] == '.') {
auto p = point(c, r);
q.insertBack(Qitem(p, 0));
v[p] = true;
}
while (!q.empty) {
auto qi = q.front; q.removeFront();
foreach (np; g.sibPoints8(qi.p))
if (!v[np]) {
g[np] = qi.len+1;
v[np] = true;
q.insertBack(Qitem(np, qi.len+1));
}
}
auto d = 0;
foreach (r; 0..h)
foreach (c; 0..w)
d = max(d, g[r][c]);
writeln(d);
}
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 Grid(T, U)
{
import std.algorithm, std.conv, std.range, std.traits, std.typecons;
const sibs4 = [Point!U(-1, 0), Point!U(0, -1), Point!U(1, 0), Point!U(0, 1)];
const sibs8 = [Point!U(-1, 0), Point!U(-1, -1), Point!U(0, -1), Point!U(1, -1),
Point!U(1, 0), Point!U(1, 1), Point!U(0, 1), Point!U(-1, 1)];
T[][] m;
const size_t rows, cols;
mixin Proxy!m;
this(size_t r, size_t c) { rows = r; cols = c; m = new T[][](rows, cols); }
this(T[][] s) { rows = s.length; cols = s[0].length; m = s; }
pure auto dup() const { return Grid(m.map!(r => r.dup).array); }
ref pure auto opIndex(Point!U p) { return m[p.y][p.x]; }
ref pure auto opIndex(size_t y) { return m[y]; }
ref pure auto opIndex(size_t y, size_t x) const { return m[y][x]; }
static if (isAssignable!T) {
auto opIndexAssign(T v, Point!U p) { return m[p.y][p.x] = v; }
auto opIndexAssign(T v, size_t y, size_t x) { return m[y][x] = v; }
auto opIndexOpAssign(string op, V)(V v, Point!U p) { return mixin("m[p.y][p.x] " ~ op ~ "= v"); }
auto opIndexOpAssign(string op, V)(V v, size_t y, size_t x) { return mixin("m[y][x] " ~ op ~ "= v"); }
}
pure auto validPoint(Point!U p) { return p.x >= 0 && p.x < cols && p.y >= 0 && p.y < rows; }
pure auto points() const { return rows.to!U.iota.map!(y => cols.to!U.iota.map!(x => Point!U(x, y))).joiner; }
pure auto sibPoints4(Point!U p) { return sibs4.map!(s => p + s).filter!(p => validPoint(p)); }
pure auto sibPoints8(Point!U p) { return sibs8.map!(s => p + s).filter!(p => validPoint(p)); }
}