結果
問題 | No.1315 渦巻洞穴 |
ユーザー |
👑 |
提出日時 | 2020-12-12 00:39:35 |
言語 | D (dmd 2.109.1) |
結果 |
AC
|
実行時間 | 53 ms / 2,000 ms |
コード長 | 4,359 bytes |
コンパイル時間 | 1,091 ms |
コンパイル使用メモリ | 121,624 KB |
実行使用メモリ | 6,948 KB |
最終ジャッジ日時 | 2024-06-22 10:17:15 |
合計ジャッジ時間 | 6,834 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge5 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 79 |
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];long get(long x, long y) {const r = max(abs(x), abs(y));if (x == r && y > -r) {return (2 * r - 1)^^2 + (y - (-r));} else if (y == r) {return (2 * r - 1)^^2 + 2 * r + (r - x);} else if (x == -r) {return (2 * r - 1)^^2 + 4 * r + (r - y);} else {return (2 * r - 1)^^2 + 6 * r + (x - (-r));}}int[] solve(long start, long target) {if (start == 1) {if (target == 0) {// 1232121return [0, 1, 3, 2, 0, 2];} else {return [];}}long x, y;for (long r = 0; ; ++r) {if (start <= (2 * r - 1)^^2 + 2 * r) {x = r;y = (-r) + (start - (2 * r - 1)^^2);break;} else if (start <= (2 * r - 1)^^2 + 4 * r) {x = r - (start - (2 * r - 1)^^2 - 2 * r);y = r;break;} else if (start <= (2 * r - 1)^^2 + 6 * r) {x = -r;y = r - (start - (2 * r - 1)^^2 - 4 * r);break;} else if (start <= (2 * r - 1)^^2 + 8 * r) {x = (-r) + (start - (2 * r - 1)^^2 - 6 * r);y = -r;break;}}debug {writeln("solve ", start, " ", target, ": ", x, " ", y);}assert(get(x, y) == start);int[] ret;long sum = target ^ start;const x0 = x, y0 = y;for (; get(x, y) > 1; ) {int dir;long xx, yy;if (sum <= 1) {if (get(x, y) == 3) {if (sum == 0) {// 23232121ret ~= [3, 1, 3, 1, 3, 2, 0, 2];} else {// 232121ret ~= [3, 1, 3, 2, 0, 2];}sum = 0;break;} else {for (dir = 0; dir < 4; ++dir) {xx = x + DX[dir], yy = y + DY[dir];if (max(abs(x), abs(y)) > max(abs(xx), abs(yy))) {goto found;}}for (dir = 0; dir < 4; ++dir) {xx = x + DX[dir], yy = y + DY[dir];if (max(abs(x), abs(y)) == max(abs(xx), abs(yy))) {if ((get(x, y) ^ get(xx, yy)) != 1) {goto found;}}}assert(false);}} else {for (dir = 0; dir < 4; ++dir) {xx = x + DX[dir], yy = y + DY[dir];if ((get(x, y) ^ get(xx, yy)) == 1) {goto found;}}assert(false);}found:ret ~= dir;sum ^= get(xx, yy);x = xx;y = yy;}if (sum != 0) {foreach (dir; 0 .. 4) {if ((get(x0, y0) ^ get(x0 + DX[dir], y0 + DY[dir])) == 1) {ret = [dir, dir ^ 2] ~ ret;break;}}}return ret;}void main() {debug {foreach_reverse (y; -4 .. +4 + 1) {foreach (x; -4 .. +4 + 1) {write(get(x, y), " ");}writeln;}}try {for (; ; ) {const S = readLong();const T = readLong();const res0 = solve(S, 0);const res1 = solve(T, 1);int[] ans;foreach (dir; res0) {ans ~= dir;}foreach_reverse (dir; res1) {ans ~= dir ^ 2;}writeln(0);writeln(ans.length);foreach (dir; ans) {write("RULD"[dir]);}writeln;}} catch (EOFException e) {}}