結果
問題 | No.1391 ±1 Abs Sum |
ユーザー |
👑 |
提出日時 | 2022-10-27 22:01:59 |
言語 | D (dmd 2.109.1) |
結果 |
AC
|
実行時間 | 43 ms / 2,000 ms |
コード長 | 2,697 bytes |
コンパイル時間 | 863 ms |
コンパイル使用メモリ | 122,068 KB |
実行使用メモリ | 13,528 KB |
最終ジャッジ日時 | 2024-06-22 16:31:43 |
合計ジャッジ時間 | 3,953 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge1 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 34 |
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 main() {try {for (; ; ) {const N = readInt;const K = N - readInt;auto A = new long[N];foreach (i; 0 .. N) {A[i] = readLong;}auto ASum = new long[N + 1];foreach (i; 0 .. N) {ASum[i + 1] = ASum[i] + A[i];}long ans = long.max;const half = N / 2;foreach (k; 0 .. K + 1) {const l = max(k - 1, 0);const r = min(N - (K - k), N - 1);// (-1) k, (+1) N-K, K-k// K-k, N-K, kconst im = (half < K - k) ? l : (half < N - k) ? (k + (half - (K - k))) : r;long calc(int i0, int i1) {long ret;if (i0 <= im) {// \sum (A[im] - A[i])const lb = i0;const ub = min(i1, im);ret += A[im] * (ub - lb);ret -= (ASum[ub] - ASum[lb]);}if (im < i1) {// \sum (A[i] - A[im])const lb = max(i0, im);const ub = i1;ret += (ASum[ub] - ASum[lb]);ret -= A[im] * (ub - lb);}debug {writefln(" calc %s %s %s = %s", im, i0, i1, ret);}return ret;}long cost;cost -= calc(0, k);cost += calc(k, N - (K - k));cost -= calc(N - (K - k), N);debug {writefln("%s: %s %s; %s; %s", k, l, r, im, cost);}chmin(ans, cost);}writeln(ans);}} catch (EOFException e) {}}