結果

問題 No.738 平らな農地
ユーザー 👑 hos.lyric
提出日時 2019-01-27 14:42:06
言語 D
(dmd 2.109.1)
結果
AC  
実行時間 81 ms / 2,000 ms
コード長 3,524 bytes
コンパイル時間 1,364 ms
コンパイル使用メモリ 130,012 KB
実行使用メモリ 11,076 KB
最終ジャッジ日時 2024-06-13 03:46:21
合計ジャッジ時間 8,283 ms
ジャッジサーバーID
(参考情報)
judge3 / judge2
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ファイルパターン 結果
sample AC * 5
other AC * 87
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.stdio, std.string;
import std.algorithm, std.array, std.bigint, std.container, std.math, std.numeric, std.range, 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 sum = 0;
for (int x = pos - 1; x >= 0; x = (x & (x + 1)) - 1) {
sum += bit[x];
}
return sum;
}
// min pos s.t. pred(sum of [0, pos))
T bBinarySearch(alias pred, T)(T[] bit)
in {
assert(!(bit.length & (bit.length - 1)),
"bBinarySearch: |bit| must be a power of 2");
}
do {
import std.functional : unaryFun;
alias predFun = unaryFun!pred;
if (predFun(0)) return 0;
if (!predFun(bit[$ - 1])) return cast(int)(bit.length) + 1;
int lo = 0, hi = cast(int)(bit.length);
T sum = 0;
for (; lo + 1 < hi; ) {
const mid = (lo + hi) >> 1;
if (predFun(sum + bit[mid - 1])) {
hi = mid;
} else {
lo = mid;
sum += bit[mid - 1];
}
}
return hi;
}
enum INF = 10L^^18;
int N, K;
long[] A;
void main() {
try {
for (; ; ) {
N = readInt();
K = readInt();
A = new long[N];
foreach (i; 0 .. N) {
A[i] = readLong();
}
auto as = new Tuple!(long, int)[N];
foreach (i; 0 .. N) {
as[i] = tuple(A[i], i);
}
as.sort;
auto poss = new int[N];
foreach (i; 0 .. N) {
poss[as[i][1]] = i;
}
int bitN;
for (bitN = 1; bitN < N; bitN <<= 1) {}
auto bitCnt = new int[bitN];
auto bitSum = new long[bitN];
long ans = INF;
foreach (i; 0 .. N) {
bitCnt.bAdd(poss[i], +1);
bitSum.bAdd(poss[i], +A[i]);
if (i >= K - 1) {
const med = bitCnt.bBinarySearch!(cnt => (cnt >= (K + 1) / 2));
const aMed = as[med - 1][0];
const cntL = bitCnt.bSum(med);
const sumL = bitSum.bSum(med);
long cost;
cost += (cntL * aMed - sumL);
cost += ((bitSum.bSum(bitN) - sumL) - (K - cntL) * aMed);
debug {
writefln("[%s, %s]: %s %s", i - K + 1, i, aMed, cost);
}
chmin(ans, cost);
bitCnt.bAdd(poss[i - K + 1], -1);
bitSum.bAdd(poss[i - K + 1], -A[i - K + 1]);
}
}
writeln(ans);
}
} catch (EOFException e) {
}
}
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