#723678 (D) No.1773 Love Triangle

提出ソース

結果

問題	No.1773 Love Triangle
ユーザー	👑 hos.lyric
提出日時	2021-12-12 06:48:21
言語	D (dmd 2.109.1)
結果	AC
実行時間	633 ms / 2,000 ms
コード長	4,975 bytes
コンパイル時間	734 ms
コンパイル使用メモリ	122,076 KB
実行使用メモリ	6,948 KB
最終ジャッジ日時	2024-06-22 13:38:11
合計ジャッジ時間	28,120 ms
ジャッジサーバーID （参考情報）	judge2 / judge3

このコードへのチャレンジ
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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 6,820 KB
testcase_01	AC	1 ms 6,940 KB
testcase_02	AC	2 ms 6,940 KB
testcase_03	AC	2 ms 6,940 KB
testcase_04	AC	1 ms 6,944 KB
testcase_05	AC	2 ms 6,940 KB
testcase_06	AC	1 ms 6,944 KB
testcase_07	AC	1 ms 6,944 KB
testcase_08	AC	2 ms 6,940 KB
testcase_09	AC	2 ms 6,940 KB
testcase_10	AC	1 ms 6,940 KB
testcase_11	AC	2 ms 6,944 KB
testcase_12	AC	1 ms 6,944 KB
testcase_13	AC	1 ms 6,940 KB
testcase_14	AC	1 ms 6,940 KB
testcase_15	AC	2 ms 6,944 KB
testcase_16	AC	1 ms 6,944 KB
testcase_17	AC	2 ms 6,944 KB
testcase_18	AC	299 ms 6,940 KB
testcase_19	AC	3 ms 6,940 KB
testcase_20	AC	24 ms 6,944 KB
testcase_21	AC	1 ms 6,944 KB
testcase_22	AC	23 ms 6,944 KB
testcase_23	AC	11 ms 6,944 KB
testcase_24	AC	92 ms 6,944 KB
testcase_25	AC	80 ms 6,944 KB
testcase_26	AC	3 ms 6,940 KB
testcase_27	AC	3 ms 6,940 KB
testcase_28	AC	4 ms 6,940 KB
testcase_29	AC	1 ms 6,940 KB
testcase_30	AC	223 ms 6,944 KB
testcase_31	AC	119 ms 6,944 KB
testcase_32	AC	108 ms 6,944 KB
testcase_33	AC	34 ms 6,944 KB
testcase_34	AC	3 ms 6,944 KB
testcase_35	AC	4 ms 6,944 KB
testcase_36	AC	69 ms 6,940 KB
testcase_37	AC	2 ms 6,944 KB
testcase_38	AC	553 ms 6,944 KB
testcase_39	AC	540 ms 6,944 KB
testcase_40	AC	544 ms 6,940 KB
testcase_41	AC	606 ms 6,944 KB
testcase_42	AC	591 ms 6,940 KB
testcase_43	AC	587 ms 6,944 KB
testcase_44	AC	568 ms 6,940 KB
testcase_45	AC	511 ms 6,944 KB
testcase_46	AC	564 ms 6,944 KB
testcase_47	AC	569 ms 6,944 KB
testcase_48	AC	545 ms 6,940 KB
testcase_49	AC	539 ms 6,944 KB
testcase_50	AC	536 ms 6,940 KB
testcase_51	AC	633 ms 6,940 KB
testcase_52	AC	531 ms 6,940 KB
testcase_53	AC	525 ms 6,944 KB
testcase_54	AC	520 ms 6,940 KB
testcase_55	AC	571 ms 6,940 KB
testcase_56	AC	511 ms 6,940 KB
testcase_57	AC	549 ms 6,940 KB
testcase_58	AC	545 ms 6,944 KB
testcase_59	AC	540 ms 6,948 KB
testcase_60	AC	539 ms 6,944 KB
testcase_61	AC	538 ms 6,940 KB
testcase_62	AC	551 ms 6,944 KB
testcase_63	AC	529 ms 6,940 KB
testcase_64	AC	550 ms 6,940 KB
testcase_65	AC	550 ms 6,944 KB
testcase_66	AC	595 ms 6,940 KB
testcase_67	AC	543 ms 6,944 KB
testcase_68	AC	559 ms 6,940 KB
testcase_69	AC	549 ms 6,940 KB
testcase_70	AC	508 ms 6,940 KB
testcase_71	AC	547 ms 6,940 KB
testcase_72	AC	537 ms 6,944 KB
testcase_73	AC	565 ms 6,940 KB
testcase_74	AC	578 ms 6,940 KB
testcase_75	AC	546 ms 6,940 KB
testcase_76	AC	511 ms 6,944 KB
testcase_77	AC	517 ms 6,944 KB
testcase_78	AC	1 ms 6,940 KB
testcase_79	AC	4 ms 6,940 KB
testcase_80	AC	6 ms 6,944 KB
testcase_81	AC	364 ms 6,940 KB
testcase_82	AC	322 ms 6,944 KB
testcase_83	AC	91 ms 6,940 KB
testcase_84	AC	135 ms 6,940 KB
testcase_85	AC	217 ms 6,940 KB
testcase_86	AC	54 ms 6,944 KB
testcase_87	AC	128 ms 6,940 KB
testcase_88	AC	89 ms 6,940 KB
testcase_89	AC	91 ms 6,944 KB
testcase_90	AC	286 ms 6,944 KB
testcase_91	AC	202 ms 6,944 KB
testcase_92	AC	44 ms 6,940 KB

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ソースコード

raw source code

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)); }

struct ModInt(uint M_) {
  import std.conv : to;
  alias M = M_;
  uint x;
  this(ModInt a) { x = a.x; }
  this(uint x_) { x = x_ % M; }
  this(ulong x_) { x = x_ % M; }
  this(int x_) { x = ((x_ %= cast(int)(M)) < 0) ? (x_ + cast(int)(M)) : x_; }
  this(long x_) { x = cast(uint)(((x_ %= cast(long)(M)) < 0) ? (x_ + cast(long)(M)) : x_); }
  ref ModInt opAssign(T)(inout(T) a) if (is(T == uint) || is(T == ulong) || is(T == int) || is(T == long)) { return this = ModInt(a); }
  ref ModInt opOpAssign(string op, T)(T a) {
    static if (is(T == ModInt)) {
      static if (op == "+") { x = ((x += a.x) >= M) ? (x - M) : x; }
      else static if (op == "-") { x = ((x -= a.x) >= M) ? (x + M) : x; }
      else static if (op == "*") { x = cast(uint)((cast(ulong)(x) * a.x) % M); }
      else static if (op == "/") { this *= a.inv(); }
      else static assert(false);
      return this;
    } else static if (op == "^^") {
      if (a < 0) return this = inv()^^(-a);
      ModInt b = this, c = 1U;
      for (long e = a; e; e >>= 1) { if (e & 1) c *= b; b *= b; }
      return this = c;
    } else {
      return mixin("this " ~ op ~ "= ModInt(a)");
    }
  }
  ModInt inv() const {
    uint a = M, b = x; int y = 0, z = 1;
    for (; b; ) { const q = a / b; const c = a - q * b; a = b; b = c; const w = y - cast(int)(q) * z; y = z; z = w; }
    assert(a == 1); return ModInt(y);
  }
  ModInt opUnary(string op)() const {
    static if (op == "+") { return this; }
    else static if (op == "-") { ModInt a; a.x = x ? (M - x) : 0U; return a; }
    else static assert(false);
  }
  ModInt opBinary(string op, T)(T a) const { return mixin("ModInt(this) " ~ op ~ "= a"); }
  ModInt opBinaryRight(string op, T)(T a) const { return mixin("ModInt(a) " ~ op ~ "= this"); }
  bool opCast(T: bool)() const { return (x != 0U); }
  string toString() const { return x.to!string; }
}

enum MO = 998244353;
alias Mint = ModInt!MO;


uint xrand() {
  static uint x = 314159265, y = 358979323, z = 846264338, w = 327950288;
  uint t = x ^ x << 11; x = y; y = z; z = w; return w = w ^ w >> 19 ^ t ^ t >> 8;
}


void main() {
  try {
    for (; ; ) {
      const N = readInt();
      const M = readInt();
      auto U = new int[M];
      auto V = new int[M];
      auto W = new int[M];
      foreach (i; 0 .. M) {
        U[i] = readInt() - 1;
        V[i] = readInt() - 1;
        W[i] = readInt() - 1;
      }
      
      int ans;
      foreach (_; 0 .. 2) {
        auto a = new Mint[][](N, N);
        foreach (i; 0 .. M) {
          /*
            e[u]: unit vector
            E[u][v]: matrix unit
            
            a = e[u] - e[v]
            b = e[u] - e[w]
            a b' = E[u][u] - E[u][w] - E[v][u] + E[v][w]
            b a' = E[u][u] - E[u][v] - E[w][u] + E[w][v]
            a b' - b a' = E[u][v] + E[v][w] + E[w][u] - E[u][w] - E[w][v] - E[v][u]
          */
          const u = U[i];
          const v = V[i];
          const w = W[i];
          const Mint x = xrand() % MO;
          a[u][v] += x;
          a[v][w] += x;
          a[w][u] += x;
          a[u][w] -= x;
          a[w][v] -= x;
          a[v][u] -= x;
        }
        
        int r;
        foreach (h; 0 .. N) {
          foreach (u; r .. N) {
            if (a[u][h]) {
              swap(a[r], a[u]);
              break;
            }
          }
          if (a[r][h]) {
            const s = a[r][h].inv;
            foreach (j; h + 1 .. N) {
              a[r][j] *= s;
            }
            foreach (i; r + 1 .. N) {
              const t = a[i][h];
              foreach (j; h + 1 .. N) {
                a[i][j] -= t * a[r][j];
              }
            }
            ++r;
          }
        }
        chmax(ans, r);
      }
      ans /= 2;
      
      writeln(ans);
    }
  } catch (EOFException e) {
  }
}

yukicoder

結果

テストケース

ソースコード