結果

問題 No.1036 Make One With GCD 2
コンテスト
ユーザー hos.lyric
提出日時 2020-04-24 21:35:57
言語 D
(dmd 2.109.1)
結果
AC  
実行時間 777 ms / 2,000 ms
コード長 4,251 bytes
コンパイル時間 784 ms
コンパイル使用メモリ 122,664 KB
実行使用メモリ 37,908 KB
最終ジャッジ日時 2024-06-22 06:43:49
合計ジャッジ時間 15,085 ms
ジャッジサーバーID
（参考情報） 		judge4 / judge1
このコードへのチャレンジ
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ファイルパターン 結果
sample AC * 4
other AC * 41
権限があれば一括ダウンロードができます
コンパイルメッセージ
/home/linuxbrew/.linuxbrew/opt/dmd/include/dlang/dmd/std/numeric.d(2999): Warning: cannot inline function `std.numeric.gcdImpl!ulong.gcdImpl`
/home/linuxbrew/.linuxbrew/opt/dmd/include/dlang/dmd/std/numeric.d(2999): Warning: cannot inline function `std.numeric.gcdImpl!ulong.gcdImpl`

ソースコード

diff # 

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)); }

// T: monoid
// op: T * T -> T
// query(a, b): returns t_a ... t_{b-1}
class SegmentTree(T, alias op) {
  import std.functional : binaryFun;
  alias opFun = binaryFun!op;
  const(T) idT;

  int n;
  T[] ts;
  this(int n_, const(T) idT) {
    this.idT = idT;
    for (n = 1; n < n_; n <<= 1) {}
    ts = new T[n << 1];
    ts[] = idT;
  }
  this(inout(T)[] ts_, const(T) idT) {
    this.idT = idT;
    const n_ = cast(int)(ts_.length);
    for (n = 1; n < n_; n <<= 1) {}
    ts = new T[n << 1];
    ts[0 .. n] = idT;
    ts[n .. n + n_] = ts_[];
    ts[n + n_ .. n << 1] = idT;
    build();
  }
  ref T at(int a) {
    return ts[n + a];
  }
  void build() {
    foreach_reverse (a; 1 .. n) ts[a] = opFun(ts[a << 1], ts[a << 1 | 1]);
  }
  void set(int a, const(T) val) {
    ts[a += n] = val;
    for (; a >>= 1; ) ts[a] = opFun(ts[a << 1], ts[a << 1 | 1]);
  }
  void mulL(int a, const(T) val) {
    set(a, opFun(val, ts[a + n]));
  }
  void mulR(int a, const(T) val) {
    set(a, opFun(ts[a + n], val));
  }
  T query(int a, int b) const {
    T prodL = idT, prodR = idT;
    for (a += n, b += n; a < b; a >>= 1, b >>= 1) {
      if (a & 1) prodL = opFun(prodL, ts[a++]);
      if (b & 1) prodR = opFun(ts[--b], prodR);
    }
    return opFun(prodL, prodR);
  }

  // min b s.t. pred(prod of [a, b)) (or n + 1 if no such b)
  //   0 <= a <= n
  //   assume pred(prod of [a, b)) is non-decreasing in b
  int binarySearchR(int a, bool delegate(T) pred) const {
    if (pred(idT)) return a;
    if (a == n) return n + 1;
    T prod = idT;
    for (a += n; ; a >>= 1) {
      if (a & 1) {
        if (pred(opFun(prod, ts[a]))) {
          for (; a < n; ) {
            a <<= 1;
            if (!pred(opFun(prod, ts[a]))) {
              prod = opFun(prod, ts[a++]);
            }
          }
          return a - n + 1;
        }
        prod = opFun(prod, ts[a++]);
        if (!(a & a - 1)) return n + 1;
      }
    }
  }

  // max a s.t. pred(prod of [a, b)) (or -1 if no such a)
  //   0 <= b <= n
  //   assume pred(prod of [a, b)) is non-increasing in a
  int binarySearchL(int b, bool delegate(T) pred) const {
    if (pred(idT)) return b;
    if (b == 0) return -1;
    T prod = idT;
    for (b += n; ; b >>= 1) {
      if ((b & 1) || b == 2) {
        if (pred(opFun(prod, ts[b - 1]))) {
          for (; b <= n; ) {
            b <<= 1;
            if (!pred(opFun(prod, ts[b - 1]))) {
              prod = opFun(prod, ts[--b]);
            }
          }
          return b - n - 1;
        }
        prod = opFun(prod, ts[--b]);
        if (!(b & b - 1)) return -1;
      }
    }
  }
}



void main() {
  try {
    for (; ; ) {
      const N = readInt();
      auto A = new long[N];
      foreach (i; 0 .. N) {
        A[i] = readLong();
      }
      
      auto seg = new SegmentTree!(long, gcd)(A, 0);
      long ans;
      foreach (i; 0 .. N) {
        const res = seg.binarySearchR(i, a => (a == 1));
        debug {
          writeln(i, ": ", res);
        }
        ans += max(N - res + 1, 0);
      }
      writeln(ans);
    }
  } catch (EOFException e) {
  }
}
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