結果
問題 | No.659 徘徊迷路 |
ユーザー | te-sh |
提出日時 | 2018-04-16 17:49:29 |
言語 | D (dmd 2.106.1) |
結果 |
AC
|
実行時間 | 119 ms / 2,000 ms |
コード長 | 2,892 bytes |
コンパイル時間 | 2,583 ms |
コンパイル使用メモリ | 152,960 KB |
実行使用メモリ | 6,948 KB |
最終ジャッジ日時 | 2024-06-13 00:30:03 |
合計ジャッジ時間 | 4,040 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge4 |
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テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | AC | 1 ms
6,812 KB |
testcase_01 | AC | 25 ms
6,944 KB |
testcase_02 | AC | 1 ms
6,940 KB |
testcase_03 | AC | 1 ms
6,940 KB |
testcase_04 | AC | 30 ms
6,940 KB |
testcase_05 | AC | 1 ms
6,944 KB |
testcase_06 | AC | 2 ms
6,940 KB |
testcase_07 | AC | 1 ms
6,940 KB |
testcase_08 | AC | 42 ms
6,940 KB |
testcase_09 | AC | 100 ms
6,940 KB |
testcase_10 | AC | 119 ms
6,944 KB |
testcase_11 | AC | 118 ms
6,948 KB |
testcase_12 | AC | 23 ms
6,940 KB |
testcase_13 | AC | 104 ms
6,940 KB |
testcase_14 | AC | 98 ms
6,940 KB |
testcase_15 | AC | 115 ms
6,944 KB |
testcase_16 | AC | 117 ms
6,944 KB |
ソースコード
import std.algorithm, std.container, std.conv, std.math, std.range, std.typecons, std.stdio, std.string; void readV(T...)(ref T t){auto r=readln.splitter;foreach(ref v;t){v=r.front.to!(typeof(v));r.popFront;}} void readC(T...)(size_t n,ref T t){foreach(ref v;t)v=new typeof(v)(n);foreach(i;0..n){auto r=readln.splitter;foreach(ref v;t){v[i]=r.front.to!(ElementType!(typeof(v)));r.popFront;}}} void main() { int r, c, t; readV(r, c, t); int sx, sy; readV(sx, sy); int gx, gy; readV(gx, gy); string[] b; readC(r, b); auto n = (r-2)*(c-2), a = Matrix!real(n, n); auto idx(int i, int j) { return (i-1)*(c-2)+(j-1); } foreach (i; 1..r-1) foreach (j; 1..c-1) { if (b[i][j] == '#') continue; auto d = [b[i-1][j], b[i+1][j], b[i][j-1], b[i][j+1]].map!(bij => bij == '.' ? 1 : 0).sum; auto id1 = idx(i, j); if (d == 0) { a[id1][id1] = 1; } else { if (b[i-1][j] == '.') a[idx(i-1, j)][id1] = 1.0L/d; if (b[i+1][j] == '.') a[idx(i+1, j)][id1] = 1.0L/d; if (b[i][j-1] == '.') a[idx(i, j-1)][id1] = 1.0L/d; if (b[i][j+1] == '.') a[idx(i, j+1)][id1] = 1.0L/d; } } auto v = new real[](n); v[] = 0; v[idx(sx, sy)] = 1; auto p = repeatedSquare(a, t, Matrix!real.unit(n)) * v; writefln("%.7f", p[idx(gx, gy)]); } pure T repeatedSquare(alias pred = "a * b", T, U)(T a, U n) { return repeatedSquare!(pred, T, U)(a, n, T(1)); } pure T repeatedSquare(alias pred = "a * b", T, U)(T a, U n, T init) { import std.functional; alias predFun = binaryFun!pred; if (n == 0) return init; auto r = init; while (n > 0) { if (n&1) r = predFun(r, a); a = predFun(a, a); n >>= 1; } return r; } struct Matrix(T) { size_t r, c; T[][] a; alias a this; static ref auto unit(size_t n) { auto r = Matrix!T(n, n); foreach (i; 0..n) r[i][i] = 1; return r; } this(size_t r, size_t c) { this.r = r; this.c = c; a = new T[][](r, c); static if (T.init != 0) foreach (i; 0..r) a[i][] = 0; } this(T[][] b) { r = b.length; c = b[0].length; a = b; } ref auto dup() { auto x = Matrix!T(r, c); foreach (i; 0..r) x[i][] = a[i][]; return x; } ref auto opBinary(string op)(Matrix!T b) if (op == "+" || op == "-") in { assert(r == b.r && c == b.c); } body { auto x = Matrix!T(r, c); foreach (i; 0..r) foreach (j; 0..c) x[i][j] = mixin("a[i][j]"~op~"b[i][j]"); return x; } ref auto opBinary(string op: "*")(Matrix!T b) in { assert(c == b.r); } body { auto x = Matrix!T(r, b.c); foreach (i; 0..r) foreach (j; 0..b.c) foreach (k; 0..c) x[i][j] += a[i][k]*b[k][j]; return x; } ref auto opBinary(string op: "*")(T[] b) in { assert(c == b.length); } body { auto x = new T[](r); static if (T.init != 0) x[] = 0; foreach (i; 0..r) foreach (j; 0..c) x[i] += a[i][j]*b[j]; return x; } }