結果
| 問題 |
No.2029 Swap Min Max Min
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2022-08-05 22:20:15 |
| 言語 | D (dmd 2.109.1) |
| 結果 |
WA
(最新)
AC
(最初)
|
| 実行時間 | - |
| コード長 | 3,513 bytes |
| コンパイル時間 | 818 ms |
| コンパイル使用メモリ | 121,336 KB |
| 実行使用メモリ | 20,908 KB |
| 最終ジャッジ日時 | 2024-06-22 15:58:17 |
| 合計ジャッジ時間 | 4,625 ms |
|
ジャッジサーバーID (参考情報) |
judge3 / judge4 |
(要ログイン)
| ファイルパターン | 結果 |
|---|---|
| sample | AC * 2 WA * 1 |
| other | AC * 31 WA * 11 |
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)); }
void bAdd(T)(T[] bit, int pos, T val)
in {
assert(0 <= pos && pos < bit.length, "bAdd: 0 <= pos < |bit| must hold");
}
do {
for (int x = pos; x < bit.length; x |= x + 1) {
bit[x] += val;
}
}
// sum of [0, pos)
T bSum(T)(T[] bit, int pos)
in {
assert(0 <= pos && pos <= bit.length, "bSum: 0 <= pos <= |bit| must hold");
}
do {
T ret = 0;
for (int x = pos - 1; x >= 0; x = (x & (x + 1)) - 1) {
ret += bit[x];
}
return ret;
}
long solve(const(int[]) A, const(int[]) B) {
const N = cast(int)(A.length);
auto pos = new int[N];
foreach (i; 0 .. N) {
pos[B[i]] = i;
}
long cost;
auto bit = new long[N];
foreach (i; 0 .. N) {
const x = pos[A[i]];
cost += (i - bit.bSum(x));
bit.bAdd(x, 1);
}
return cost;
}
void main() {
/*
debug {
foreach (n; 1 .. 8 + 1) {
int mn = int.max;
int[][] pmss;
auto ps = iota(n).array;
do {
int mx;
foreach (i; 0 .. n - 1) {
chmax(mx, min(ps[i], ps[i + 1]));
}
if (chmin(mn, mx)) {
pmss = [];
}
if (mn == mx) {
pmss ~= ps.dup;
}
} while (ps.nextPermutation);
stderr.writeln(n, ": ", mn, " ", pmss.length);
stderr.flush;
foreach (pms; pmss) {
writeln(pms);
}
stdout.flush;
}
return;
}
*/
try {
for (; ; ) {
const N = readInt;
auto A = new int[N];
foreach (i; 0 .. N) {
A[i] = readInt - 1;
}
const thr = (N - 2) / 2;
int[] smalls, larges;
foreach (a; A) {
if (a <= thr) {
smalls ~= a;
} else {
larges ~= a;
}
}
long ans = long.max;
if (N % 2 != 0) {
int[] bs;
foreach (i; 0 .. N / 2) {
bs ~= larges[i];
bs ~= smalls[i];
}
bs ~= larges[N / 2];
chmin(ans, solve(A, bs));
} else {
foreach (s; 0 .. 2) {
int[] bs;
foreach (i; 0 .. N / 2) {
if (s) {
bs ~= larges[i];
bs ~= smalls[i];
} else {
bs ~= smalls[i];
bs ~= larges[i];
}
}
chmin(ans, solve(A, bs));
}
}
writeln(thr + 1, " ", ans);
}
} catch (EOFException e) {
}
}