#503088 (D) No.1100 Boxes

提出ソース

結果

問題	No.1100 Boxes
ユーザー	👑 hos.lyric
提出日時	2020-06-26 21:46:28
言語	D (dmd 2.106.1)
結果	AC
実行時間	35 ms / 2,000 ms
コード長	4,169 bytes
コンパイル時間	1,368 ms
コンパイル使用メモリ	154,960 KB
実行使用メモリ	7,120 KB
最終ジャッジ日時	2024-06-22 07:30:26
合計ジャッジ時間	2,952 ms
ジャッジサーバーID （参考情報）	judge4 / judge5

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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	6 ms 6,812 KB
testcase_01	AC	6 ms 6,940 KB
testcase_02	AC	5 ms 6,944 KB
testcase_03	AC	6 ms 6,940 KB
testcase_04	AC	6 ms 6,944 KB
testcase_05	AC	6 ms 6,940 KB
testcase_06	AC	6 ms 6,940 KB
testcase_07	AC	6 ms 6,944 KB
testcase_08	AC	6 ms 6,944 KB
testcase_09	AC	6 ms 6,940 KB
testcase_10	AC	6 ms 6,940 KB
testcase_11	AC	6 ms 6,940 KB
testcase_12	AC	6 ms 6,944 KB
testcase_13	AC	5 ms 6,940 KB
testcase_14	AC	6 ms 6,940 KB
testcase_15	AC	5 ms 6,944 KB
testcase_16	AC	6 ms 6,948 KB
testcase_17	AC	7 ms 6,944 KB
testcase_18	AC	6 ms 6,944 KB
testcase_19	AC	6 ms 6,940 KB
testcase_20	AC	8 ms 6,944 KB
testcase_21	AC	13 ms 6,940 KB
testcase_22	AC	24 ms 6,940 KB
testcase_23	AC	14 ms 6,944 KB
testcase_24	AC	17 ms 6,940 KB
testcase_25	AC	19 ms 6,944 KB
testcase_26	AC	30 ms 6,944 KB
testcase_27	AC	26 ms 7,120 KB
testcase_28	AC	11 ms 6,940 KB
testcase_29	AC	28 ms 6,948 KB
testcase_30	AC	25 ms 6,944 KB
testcase_31	AC	15 ms 7,060 KB
testcase_32	AC	23 ms 6,944 KB
testcase_33	AC	35 ms 6,944 KB
testcase_34	AC	34 ms 6,940 KB
testcase_35	AC	6 ms 6,944 KB
testcase_36	AC	20 ms 6,944 KB
testcase_37	AC	6 ms 6,940 KB
testcase_38	AC	16 ms 6,944 KB
testcase_39	AC	31 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(int M_) {
  import std.conv : to;
  alias M = M_;
  int x;
  this(ModInt a) { x = a.x; }
  this(long a) { x = cast(int)(a % M); if (x < 0) x += M; }
  ref ModInt opAssign(long a) { return (this = ModInt(a)); }
  ref ModInt opOpAssign(string op)(ModInt a) {
    static if (op == "+") { x += a.x; if (x >= M) x -= M; }
    else static if (op == "-") { x -= a.x; if (x < 0) x += M; }
    else static if (op == "*") { x = cast(int)((cast(long)(x) * a.x) % M); }
    else static if (op == "/") { this *= a.inv(); }
    else static assert(false);
    return this;
  }
  ref ModInt opOpAssign(string op)(long a) {
    static if (op == "^^") {
      if (a < 0) return (this = inv()^^(-a));
      ModInt t2 = this, te = ModInt(1);
      for (long e = a; e > 0; e >>= 1) {
        if (e & 1) te *= t2;
        t2 *= t2;
      }
      x = cast(int)(te.x);
      return this;
    } else return mixin("this " ~ op ~ "= ModInt(a)");
  }
  ModInt inv() const {
    int a = x, b = M, y = 1, z = 0, t;
    for (; ; ) {
      t = a / b; a -= t * b;
      if (a == 0) {
        assert(b == 1 || b == -1);
        return ModInt(b * z);
      }
      y -= t * z;
      t = b / a; b -= t * a;
      if (b == 0) {
        assert(a == 1 || a == -1);
        return ModInt(a * y);
      }
      z -= t * y;
    }
  }
  ModInt opUnary(string op: "-")() const { return ModInt(-x); }
  ModInt opBinary(string op, T)(T a) const {
    return mixin("ModInt(this) " ~ op ~ "= a");
  }
  ModInt opBinaryRight(string op)(long a) const {
    return mixin("ModInt(a) " ~ op ~ "= this");
  }
  bool opCast(T: bool)() const { return (x != 0); }
  string toString() const { return x.to!string; }
}

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

enum LIM = 2 * 10^^5 + 5;
Mint[] inv, fac, invFac;
void prepare() {
  inv = new Mint[LIM];
  fac = new Mint[LIM];
  invFac = new Mint[LIM];
  inv[1] = 1;
  foreach (i; 2 .. LIM) {
    inv[i] = -(Mint.M / i) * inv[cast(size_t)(Mint.M % i)];
  }
  fac[0] = invFac[0] = 1;
  foreach (i; 1 .. LIM) {
    fac[i] = fac[i - 1] * i;
    invFac[i] = invFac[i - 1] * inv[i];
  }
}
Mint binom(long n, long k) {
  if (0 <= k && k <= n) {
    assert(n < LIM);
    return fac[cast(size_t)(n)] * invFac[cast(size_t)(k)] * invFac[cast(size_t)(n - k)];
  } else {
    return Mint(0);
  }
}

int[] pretty(int M)(ModInt!M[] as) {
  import std.algorithm : map;
  import std.array : array;
  return as.map!(a => (a.x < M - a.x) ? a.x : -(M - a.x)).array;
}


void main() {
  prepare;
  
  debug {
    enum lim = 10;
    auto coef = new Mint[lim];
    foreach (i; 0 .. lim) {
      coef[i] = i % 2;
      foreach (j; 0 .. i) {
        coef[i] -= binom(i, j) * coef[j];
      }
    }
    writeln(coef.pretty);
  }
  
  try {
    for (; ; ) {
      const N = readInt();
      const K = readInt();
      
      Mint ans;
      foreach (j; 1 .. K + 1) {
        ans += -(-1)^^(j & 1) * Mint(2)^^(j - 1) * binom(K, j) * Mint(K - j)^^N;
      }
      writeln(ans);
    }
  } catch (EOFException e) {
  }
}

yukicoder

結果

テストケース

ソースコード