結果
| 問題 |
No.202 1円玉投げ
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2017-05-11 12:19:26 |
| 言語 | D (dmd 2.109.1) |
| 結果 |
AC
|
| 実行時間 | 215 ms / 5,000 ms |
| コード長 | 2,672 bytes |
| コンパイル時間 | 1,034 ms |
| コンパイル使用メモリ | 195,716 KB |
| 実行使用メモリ | 24,212 KB |
| 最終ジャッジ日時 | 2024-06-12 19:08:48 |
| 合計ジャッジ時間 | 7,068 ms |
|
ジャッジサーバーID (参考情報) |
judge5 / judge2 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 38 |
ソースコード
import std.algorithm, std.conv, std.range, std.stdio, std.string;
alias Point!int point;
const maxX = 20000, maxY = 20000, gs = 20;
auto grid = Grid!(point[], int)(maxX / gs + 1, maxY / gs + 1);
void main()
{
auto n = readln.chomp.to!size_t;
auto r = 0;
foreach (_; 0..n) {
auto rd = readln.split.to!(int[]), p = point(rd[0], rd[1]), gp = p / gs;
if (!isOverlap(p, gp)) {
grid[gp] ~= p;
++r;
}
}
writeln(r);
}
auto isOverlap(point p, point gp)
{
foreach (q; grid.sibPoints8(gp).chain([gp]))
foreach (tp; grid[q])
if ((p - tp).hypot2 < 400) return true;
return false;
}
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 opIndex(Point!U p) const { return m[p.y][p.x]; }
pure auto opIndex(size_t y) { return m[y]; }
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) const { 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) const { return sibs4.map!(s => p + s).filter!(p => validPoint(p)); }
pure auto sibPoints8(Point!U p) const { return sibs8.map!(s => p + s).filter!(p => validPoint(p)); }
}