結果

問題 No.1315 渦巻洞穴
ユーザー 👑 hos.lyric
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
このコードへのチャレンジ
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ファイルパターン 結果
sample AC * 3
other AC * 79
権限があれば一括ダウンロードができます

ソースコード

diff #
プレゼンテーションモードにする

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) {
// 1232121
return [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) {
// 23232121
ret ~= [3, 1, 3, 1, 3, 2, 0, 2];
} else {
// 232121
ret ~= [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) {
}
}
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