結果
問題 | No.2873 Kendall's Tau |
ユーザー | 👑 hos.lyric |
提出日時 | 2024-09-06 22:14:49 |
言語 | D (dmd 2.106.1) |
結果 |
AC
|
実行時間 | 343 ms / 4,500 ms |
コード長 | 2,885 bytes |
コンパイル時間 | 5,980 ms |
コンパイル使用メモリ | 176,176 KB |
実行使用メモリ | 14,524 KB |
最終ジャッジ日時 | 2024-09-06 22:15:13 |
合計ジャッジ時間 | 9,097 ms |
ジャッジサーバーID (参考情報) |
judge5 / judge4 |
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テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | AC | 1 ms
6,816 KB |
testcase_01 | AC | 1 ms
6,940 KB |
testcase_02 | AC | 1 ms
6,944 KB |
testcase_03 | AC | 1 ms
6,944 KB |
testcase_04 | AC | 1 ms
6,944 KB |
testcase_05 | AC | 1 ms
6,940 KB |
testcase_06 | AC | 1 ms
6,944 KB |
testcase_07 | AC | 314 ms
14,136 KB |
testcase_08 | AC | 343 ms
14,424 KB |
testcase_09 | AC | 323 ms
14,240 KB |
testcase_10 | AC | 319 ms
10,124 KB |
testcase_11 | AC | 312 ms
6,944 KB |
testcase_12 | AC | 311 ms
14,524 KB |
testcase_13 | AC | 101 ms
9,728 KB |
testcase_14 | AC | 248 ms
14,024 KB |
testcase_15 | AC | 55 ms
6,940 KB |
testcase_16 | AC | 62 ms
6,944 KB |
testcase_17 | AC | 227 ms
13,384 KB |
testcase_18 | AC | 175 ms
13,148 KB |
testcase_19 | AC | 217 ms
6,944 KB |
testcase_20 | AC | 60 ms
6,944 KB |
testcase_21 | AC | 201 ms
13,400 KB |
testcase_22 | AC | 86 ms
6,944 KB |
testcase_23 | AC | 194 ms
13,864 KB |
testcase_24 | AC | 25 ms
6,940 KB |
testcase_25 | AC | 48 ms
6,940 KB |
testcase_26 | AC | 229 ms
13,580 KB |
testcase_27 | AC | 144 ms
14,256 KB |
testcase_28 | AC | 278 ms
11,636 KB |
testcase_29 | AC | 295 ms
14,384 KB |
testcase_30 | AC | 45 ms
6,944 KB |
testcase_31 | AC | 85 ms
7,628 KB |
testcase_32 | AC | 192 ms
12,112 KB |
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; } string COLOR(string s = "") { return "\x1b[" ~ s ~ "m"; } 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; } T bSum(T)(T[] bit, int a, int b) { return bit.bSum(b) - bit.bSum(a); } alias Pt = Tuple!(int, "x", int, "y"); void main() { try { for (; ; ) { const N = readInt; auto P = new Pt[N]; foreach (u; 0 .. N) { P[u].x = readInt; P[u].y = readInt; } P.sort; auto ys = new int[N]; foreach (u; 0 .. N) ys[u] = P[u].y; ys = ys.sort.uniq.array; const ysLen = cast(int)(ys.length); auto bit = new int[ysLen]; long[4] ans; ans[2] = ans[3] = 1L * N * (N-1) / 2; for (int i = 0, j; i < N; i = j) { for (; j < N && P[i].x == P[j].x; ++j) {} foreach (k; i .. j) { const pos = ys.lowerBound(P[k].y); ans[0] += bit.bSum(0, pos); ans[1] += bit.bSum(pos + 1, ysLen); } foreach (k; i .. j) { const pos = ys.lowerBound(P[k].y); bit.bAdd(pos, +1); } ans[2] -= 1L * (j-i) * (j-i-1) / 2; } foreach (i; 0 .. ysLen) { const n = bit.bSum(i, i + 1); ans[3] -= 1L * n * (n-1) / 2; } debug writeln(ans); writefln("%.20f", (ans[0] - ans[1]) / sqrt(1.0L * ans[2] * ans[3])); } } catch (EOFException e) { } }