結果

問題 No.1854 Limited Bubble Sort
ユーザー 👑 hos.lyric
提出日時 2022-02-25 23:27:12
言語 D
(dmd 2.109.1)
結果
AC  
実行時間 527 ms / 2,000 ms
コード長 4,888 bytes
コンパイル時間 1,667 ms
コンパイル使用メモリ 161,452 KB
実行使用メモリ 6,948 KB
最終ジャッジ日時 2024-06-22 14:25:48
合計ジャッジ時間 6,091 ms
ジャッジサーバーID
(参考情報)
judge3 / judge2
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 * 1
other AC * 25
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)); }
int[] solve(int[] P) {
const N = cast(int)(P.length);
int[] cuts;
cuts ~= -1;
foreach (i; 0 .. N) if (P[i] == i) {
cuts ~= i;
}
cuts ~= N;
const len = cast(int)(cuts.length) - 1;
auto ps = P.dup;
foreach (j; 0 .. len) {
ps[cuts[j] + 1 .. cuts[j + 1]].sort;
}
foreach (i; 0 .. N) {
if (ps[i] != i) {
return [-1];
}
}
ps = P.dup;
int[] ans;
void oper(int i) {
assert(0 <= i); assert(i < N - 1);
assert(ps[i] != i);
assert(ps[i + 1] != i + 1);
swap(ps[i], ps[i + 1]);
ans ~= i;
}
auto ls = new int[N + 1];
auto rs = new int[N + 1];
void update() {
ls[0] = -1;
foreach (i; 0 .. N) {
ls[i + 1] = max(ls[i], ps[i]);
}
rs[N] = N;
foreach_reverse (i; 0 .. N) {
rs[i] = min(ps[i], rs[i + 1]);
}
}
update();
bool isGood(int i) {
const a = ps[i];
const b = ps[i + 1];
bool ret = true;
ret = ret && (a != i);
ret = ret && (b != i + 1);
if (a == i + 1) {
if (b == i) {
ret = ret && (ls[i] < b && a < rs[i + 2]);
} else {
ret = ret && (ls[i] < a && a < rs[i + 2]);
}
} else {
if (b == i) {
ret = ret && (ls[i] < b && b < rs[i + 2]);
} else {
//
}
}
return ret;
}
foreach (x; 0 .. N) {
int pos;
foreach (i; 0 .. N) {
if (ps[i] == x) {
pos = i;
break;
}
}
void go(int i) {
if (!isGood(i)) {
go(i - 1);
}
assert(isGood(i));
oper(i);
update();
}
foreach_reverse (i; x .. pos) {
go(i);
}
}
for (; ; ) {
bool upd;
foreach (i; 0 .. N - 1) {
}
if (!upd) {
break;
}
}
foreach (i; 0 .. N) {
assert(ps[i] == i, format("%s: %s %s", P, ans, ps));
}
return ans;
}
void main() {
debug {
foreach (n; 1 .. 6 + 1) {
DList!(int[]) que;
bool[string] vis;
auto start = iota(n).array;
vis[start.to!string] = true;
que ~= start;
for (; !que.empty; ) {
auto ps = que.front;
que.removeFront;
foreach (i; 0 .. n - 1) {
if (ps[i + 1] != i && ps[i] != i + 1) {
auto qs = ps.dup;
swap(qs[i], qs[i + 1]);
const key = qs.to!string;
if (key !in vis) {
vis[key] = true;
que ~= qs;
}
}
}
}
int cnt;
auto perm = iota(n).array;
do {
const res = solve(perm);
if (perm.to!string in vis) {
assert(res != [-1]);
} else {
assert(res == [-1]);
++cnt;
writeln(perm);
int[] cuts;
cuts ~= -1;
foreach (i; 0 .. n) if (perm[i] == i) cuts ~= i;
cuts ~= n;
auto ps = perm.dup;
foreach (j; 0 .. cast(int)(cuts.length) - 1) {
ps[cuts[j] + 1 .. cuts[j + 1]].sort;
}
bool good = true;
foreach (i; 0 .. n) good = good && (ps[i] == i);
assert(!good);
}
} while (perm.nextPermutation);
writeln(n, ": ", cnt);
}
}
try {
for (; ; ) {
const numCases = readInt;
foreach (caseId; 0 .. numCases) {
const N = readInt;
auto P = new int[N];
foreach (i; 0 .. N) {
P[i] = readInt - 1;
}
const ans = solve(P);
if (ans == [-1]) {
writeln(-1);
} else {
writeln(ans.length);
foreach (index, i; ans) {
if (index) write(" ");
write(i + 1);
}
writeln;
}
}
}
} catch (EOFException e) {
}
}
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