結果
| 問題 |
No.1323 うしらずSwap
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2020-12-20 00:12:13 |
| 言語 | D (dmd 2.109.1) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 4,112 bytes |
| コンパイル時間 | 1,084 ms |
| コンパイル使用メモリ | 127,192 KB |
| 実行使用メモリ | 115,996 KB |
| 最終ジャッジ日時 | 2024-06-22 10:27:32 |
| 合計ジャッジ時間 | 58,380 ms |
|
ジャッジサーバーID (参考情報) |
judge3 / judge4 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 29 WA * 30 |
ソースコード
import std.conv, std.functional, std.range, std.stdio, std.string;
import std.algorithm, std.array, std.bigint, std.bitmanip, std.complex, std.container, std.math, std.mathspecial, std.numeric, std.regex, std.typecons;
import core.bitop;
class EOFException : Throwable { this() { super("EOF"); } }
string[] tokens;
string readToken() { for (; tokens.empty; ) { if (stdin.eof) { throw new EOFException; } tokens = readln.split; } auto token = tokens.front; tokens.popFront; return token; }
int readInt() { return readToken.to!int; }
long readLong() { return readToken.to!long; }
real readReal() { return readToken.to!real; }
bool chmin(T)(ref T t, in T f) { if (t > f) { t = f; return true; } else { return false; } }
bool chmax(T)(ref T t, in T f) { if (t < f) { t = f; return true; } else { return false; } }
int binarySearch(alias pred, T)(in T[] as) { int lo = -1, hi = cast(int)(as.length); for (; lo + 1 < hi; ) { const mid = (lo + hi) >> 1; (unaryFun!pred(as[mid]) ? hi : lo) = mid; } return hi; }
int lowerBound(T)(in T[] as, T val) { return as.binarySearch!(a => (a >= val)); }
int upperBound(T)(in T[] as, T val) { return as.binarySearch!(a => (a > val)); }
enum DX = [+1, 0, -1, 0];
enum DY = [0, +1, 0, -1];
void main() {
try {
for (; ; ) {
const H = readInt();
const W = readInt();
const SX = readInt() - 1;
const SY = readInt() - 1;
const TX = readInt() - 1;
const TY = readInt() - 1;
auto A = new string[H];
foreach (x; 0 .. H) {
A[x] = readToken();
}
alias Pt = Tuple!(int, "x", int, "y");
DList!Pt que;
auto dist = new int[][](H, W);
auto prev = new Pt[][](H, W);
foreach (x; 0 .. H) foreach (y; 0 .. W) {
dist[x][y] = -1;
}
dist[SX][SY] = 0;
que ~= Pt(SX, SY);
for (; !que.empty; ) {
const x = que.front.x;
const y = que.front.y;
que.removeFront;
foreach (dir; 0 .. 4) {
const xx = x + DX[dir];
const yy = y + DY[dir];
if (A[xx][yy] == '.') {
if (dist[xx][yy] == -1) {
dist[xx][yy] = dist[x][y] + 1;
prev[xx][yy] = Pt(x, y);
que ~= Pt(xx, yy);
}
}
}
}
auto distT = new int[][](H, W);
foreach (x; 0 .. H) foreach (y; 0 .. W) {
distT[x][y] = -1;
}
distT[TX][TY] = 0;
que ~= Pt(TX, TY);
for (; !que.empty; ) {
const x = que.front.x;
const y = que.front.y;
que.removeFront;
foreach (dir; 0 .. 4) {
const xx = x + DX[dir];
const yy = y + DY[dir];
if (A[xx][yy] == '.') {
if (distT[xx][yy] == -1) {
distT[xx][yy] = distT[x][y] + 1;
que ~= Pt(xx, yy);
}
}
}
}
int ans;
if (dist[TX][TY] != -1) {
auto on = new bool[][](H, W);
for (int x = TX, y = TY; ; ) {
on[x][y] = true;
if (x == SX && y == SY) {
break;
}
const p = prev[x][y];
x = p.x;
y = p.y;
}
bool good;
foreach (x; 1 .. H - 1) foreach (y; 1 .. W - 1) {
if (A[x][y] == '.' && !on[x][y]) {
if (dist[TX][TY] == dist[x][y] + distT[x][y]) {
good = true;
}
}
}
if (good) {
ans = 2 * dist[TX][TY];
} else {
bool ok;
foreach (x; 1 .. H - 1) foreach (y; 1 .. W - 1) {
if (on[x][y] && !(x == SX && y == SY) && !(x == TX && y == TY)) {
foreach (dir; 0 .. 4) {
const xx = x + DX[dir];
const yy = y + DY[dir];
if (A[xx][yy] == '.' && !on[xx][yy]) {
ok = true;
}
}
}
}
if (ok) {
ans = 2 * dist[TX][TY] + 2;
} else {
ans = -1;
}
}
} else {
ans = -1;
}
writeln(ans);
}
} catch (EOFException e) {
}
}