結果

問題 No.1990 Candy Boxes
ユーザー 👑 hos.lyrichos.lyric
提出日時 2022-06-24 23:13:02
言語 D
(dmd 2.107.1)
結果
AC  
実行時間 39 ms / 2,000 ms
コード長 3,640 bytes
コンパイル時間 726 ms
コンパイル使用メモリ 107,084 KB
実行使用メモリ 13,980 KB
最終ジャッジ日時 2023-09-04 17:32:57
合計ジャッジ時間 4,862 ms
ジャッジサーバーID
(参考情報)
judge13 / judge15
このコードへのチャレンジ(β)

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
4,380 KB
testcase_01 AC 1 ms
4,376 KB
testcase_02 AC 1 ms
4,384 KB
testcase_03 AC 2 ms
4,376 KB
testcase_04 AC 1 ms
4,376 KB
testcase_05 AC 1 ms
4,376 KB
testcase_06 AC 2 ms
4,376 KB
testcase_07 AC 1 ms
4,376 KB
testcase_08 AC 1 ms
4,380 KB
testcase_09 AC 2 ms
4,376 KB
testcase_10 AC 1 ms
4,384 KB
testcase_11 AC 2 ms
4,380 KB
testcase_12 AC 30 ms
8,764 KB
testcase_13 AC 32 ms
10,352 KB
testcase_14 AC 14 ms
6,612 KB
testcase_15 AC 15 ms
7,184 KB
testcase_16 AC 16 ms
7,404 KB
testcase_17 AC 17 ms
7,956 KB
testcase_18 AC 18 ms
7,996 KB
testcase_19 AC 25 ms
11,544 KB
testcase_20 AC 28 ms
11,956 KB
testcase_21 AC 26 ms
10,688 KB
testcase_22 AC 24 ms
7,228 KB
testcase_23 AC 30 ms
12,004 KB
testcase_24 AC 29 ms
11,280 KB
testcase_25 AC 39 ms
12,564 KB
testcase_26 AC 29 ms
13,604 KB
testcase_27 AC 29 ms
13,812 KB
testcase_28 AC 22 ms
12,000 KB
testcase_29 AC 30 ms
13,760 KB
testcase_30 AC 24 ms
9,768 KB
testcase_31 AC 31 ms
13,784 KB
testcase_32 AC 18 ms
8,984 KB
testcase_33 AC 24 ms
9,684 KB
testcase_34 AC 21 ms
9,952 KB
testcase_35 AC 29 ms
13,312 KB
testcase_36 AC 29 ms
12,416 KB
testcase_37 AC 24 ms
12,864 KB
testcase_38 AC 20 ms
10,044 KB
testcase_39 AC 23 ms
13,264 KB
testcase_40 AC 28 ms
13,896 KB
testcase_41 AC 28 ms
13,980 KB
testcase_42 AC 17 ms
7,432 KB
testcase_43 AC 22 ms
9,576 KB
testcase_44 AC 20 ms
9,596 KB
testcase_45 AC 14 ms
7,564 KB
testcase_46 AC 26 ms
9,136 KB
testcase_47 AC 33 ms
13,260 KB
testcase_48 AC 30 ms
12,676 KB
testcase_49 AC 1 ms
4,380 KB
testcase_50 AC 1 ms
4,380 KB
testcase_51 AC 1 ms
4,376 KB
testcase_52 AC 2 ms
4,380 KB
testcase_53 AC 2 ms
4,380 KB
testcase_54 AC 2 ms
4,380 KB
testcase_55 AC 2 ms
4,376 KB
testcase_56 AC 2 ms
4,380 KB
testcase_57 AC 1 ms
4,376 KB
testcase_58 AC 1 ms
4,380 KB
testcase_59 AC 2 ms
4,380 KB
testcase_60 AC 2 ms
4,380 KB
testcase_61 AC 1 ms
4,380 KB
testcase_62 AC 2 ms
4,384 KB
testcase_63 AC 1 ms
4,380 KB
testcase_64 AC 1 ms
4,380 KB
testcase_65 AC 31 ms
13,364 KB
testcase_66 AC 27 ms
13,860 KB
testcase_67 AC 28 ms
13,876 KB
testcase_68 AC 16 ms
7,464 KB
testcase_69 AC 30 ms
13,340 KB
testcase_70 AC 31 ms
13,296 KB
testcase_71 AC 29 ms
12,228 KB
testcase_72 AC 35 ms
13,024 KB
testcase_73 AC 32 ms
12,440 KB
testcase_74 AC 23 ms
9,396 KB
testcase_75 AC 17 ms
8,936 KB
権限があれば一括ダウンロードができます

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)); }


bool solve(const(long[]) A) {
  const N = cast(int)(A.length);
  
  auto bs = new long[N];
  bs[0] = A[0];
  foreach (i; 1 .. N) {
    bs[i] = A[i] - bs[i - 1];
  }
  foreach (i; 0 .. N) {
    if (bs[i] < 0) {
      return false;
    }
  }
  if (bs[N - 1] != 0) {
    return false;
  }
  
  auto can = new bool[N - 1];
  foreach (i; 0 .. N - 1) if (bs[i] > 0) {
    can[i] = ((A[i] & 1) == (A[i + 1] & 1));
  }
  foreach (i; 1 .. N - 1) if (bs[i] > 0) {
    if (can[i - 1]) can[i] = true;
  }
  foreach_reverse (i; 0 .. N - 1 - 1) if (bs[i] > 0) {
    if (can[i + 1]) can[i] = true;
  }
  foreach (i; 0 .. N) if (bs[i] > 0) {
    if (!can[i]) {
      return false;
    }
  }
  
  int[] cuts;
  cuts ~= 0;
  foreach (i; 0 .. N - 1) if (bs[i] == 0) {
    cuts ~= i + 1;
  }
  const len = cast(int)(cuts.length);
  cuts ~= N;
  
  auto cnt = new int[2][N + 1];
  foreach (i; 0 .. N) {
    cnt[i + 1] = cnt[i];
    if (A[i] & 1) {
      ++cnt[i + 1][i & 1];
    }
  }
  
  foreach (j; 0 .. len) {
    const i0 = cuts[j];
    const i1 = cuts[j + 1];
    if (cnt[i1][0] - cnt[i0][0] != cnt[i1][1] - cnt[i0][1]) {
      return false;
    }
    /*
    if (i1 - i0 >= 2) {
      bool ok;
      foreach (i; i0 .. i1 - 1) if ((A[i] & 1) == (A[i + 1] & 1)) {
        ok = ok || (bs[i] >= 2);
        ok = ok || (bs[i] == 1 && cnt[i][0] - cnt[i0][0] + (!(i & 1) && !(A[i] & 1)) == cnt[i][1] - cnt[i0][1] + ((i & 1) && !(A[i] & 1)));
      }
      if (!ok) {
        return false;
      }
    }
    */
  }
  
  foreach (i; 0 .. N - 1) {
    if (bs[i] < abs(cnt[i + 1][1] - cnt[i + 1][0])) {
      return false;
    }
  }
  
  return true;
}

void main() {
  debug {{
    enum N = 10;
    enum A = 6;
    auto dp = new bool[A^^N];
    dp[0] = true;
    foreach (p; 0 .. A^^N) if (dp[p]) {
      const as = iota(N).map!(i => p / A^^i % A).array;
      foreach (i; 0 .. N - 1) {
        if (as[i] + 1 < A && as[i + 1] + 1 < A && (as[i] & 1) == (as[i + 1] & 1)) {
          dp[p + A^^i + A^^(i + 1)] = true;
        }
      }
    }
    foreach (p; 0 .. A^^N) {
      const as = iota(N).map!(i => cast(long)(p / A^^i % A)).array;
      const res = solve(as);
      assert(dp[p] == res, format("%s: %s %s", as, dp[p], res));
    }
  }}
  
  try {
    for (; ; ) {
      const N = readInt;
      auto A = new long[N];
      foreach (i; 0 .. N) {
        A[i] = readInt;
      }
      
      const ans = solve(A);
      writeln(ans ? "Yes" : "No");
    }
  } catch (EOFException e) {
  }
}
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