結果
問題 | No.569 3 x N グリッドのパスの数 |
ユーザー | 37zigen |
提出日時 | 2017-09-09 02:13:19 |
言語 | Java21 (openjdk 21) |
結果 |
AC
|
実行時間 | 176 ms / 2,000 ms |
コード長 | 4,896 bytes |
コンパイル時間 | 3,150 ms |
コンパイル使用メモリ | 88,680 KB |
実行使用メモリ | 41,876 KB |
最終ジャッジ日時 | 2024-11-07 12:45:00 |
合計ジャッジ時間 | 13,419 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge3 |
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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 | 122 ms
40,360 KB |
testcase_01 | AC | 119 ms
40,056 KB |
testcase_02 | AC | 129 ms
41,452 KB |
testcase_03 | AC | 115 ms
40,340 KB |
testcase_04 | AC | 115 ms
40,304 KB |
testcase_05 | AC | 132 ms
41,184 KB |
testcase_06 | AC | 128 ms
41,196 KB |
testcase_07 | AC | 131 ms
41,800 KB |
testcase_08 | AC | 130 ms
41,356 KB |
testcase_09 | AC | 130 ms
41,152 KB |
testcase_10 | AC | 117 ms
40,452 KB |
testcase_11 | AC | 131 ms
41,420 KB |
testcase_12 | AC | 131 ms
41,144 KB |
testcase_13 | AC | 130 ms
41,152 KB |
testcase_14 | AC | 129 ms
41,408 KB |
testcase_15 | AC | 128 ms
41,496 KB |
testcase_16 | AC | 130 ms
41,160 KB |
testcase_17 | AC | 129 ms
41,112 KB |
testcase_18 | AC | 131 ms
41,160 KB |
testcase_19 | AC | 120 ms
40,460 KB |
testcase_20 | AC | 171 ms
41,760 KB |
testcase_21 | AC | 155 ms
41,428 KB |
testcase_22 | AC | 167 ms
41,540 KB |
testcase_23 | AC | 167 ms
41,636 KB |
testcase_24 | AC | 156 ms
41,508 KB |
testcase_25 | AC | 143 ms
41,648 KB |
testcase_26 | AC | 153 ms
41,328 KB |
testcase_27 | AC | 147 ms
41,616 KB |
testcase_28 | AC | 156 ms
41,636 KB |
testcase_29 | AC | 170 ms
41,492 KB |
testcase_30 | AC | 162 ms
41,436 KB |
testcase_31 | AC | 164 ms
41,448 KB |
testcase_32 | AC | 152 ms
41,284 KB |
testcase_33 | AC | 171 ms
41,568 KB |
testcase_34 | AC | 165 ms
41,552 KB |
testcase_35 | AC | 145 ms
41,080 KB |
testcase_36 | AC | 145 ms
41,608 KB |
testcase_37 | AC | 152 ms
41,360 KB |
testcase_38 | AC | 152 ms
41,160 KB |
testcase_39 | AC | 160 ms
41,580 KB |
testcase_40 | AC | 165 ms
41,620 KB |
testcase_41 | AC | 147 ms
41,476 KB |
testcase_42 | AC | 146 ms
41,876 KB |
testcase_43 | AC | 169 ms
41,580 KB |
testcase_44 | AC | 167 ms
41,496 KB |
testcase_45 | AC | 168 ms
41,588 KB |
testcase_46 | AC | 176 ms
41,652 KB |
testcase_47 | AC | 155 ms
41,644 KB |
testcase_48 | AC | 153 ms
41,300 KB |
testcase_49 | AC | 152 ms
41,336 KB |
testcase_50 | AC | 169 ms
41,792 KB |
testcase_51 | AC | 159 ms
41,444 KB |
testcase_52 | AC | 146 ms
41,608 KB |
testcase_53 | AC | 165 ms
41,680 KB |
testcase_54 | AC | 146 ms
41,396 KB |
testcase_55 | AC | 156 ms
41,612 KB |
testcase_56 | AC | 170 ms
41,420 KB |
testcase_57 | AC | 167 ms
41,400 KB |
testcase_58 | AC | 148 ms
41,656 KB |
testcase_59 | AC | 171 ms
41,828 KB |
ソースコード
import java.io.FileNotFoundException; import java.io.PrintWriter; import java.util.ArrayDeque; import java.util.ArrayList; import java.util.Arrays; import java.util.HashMap; import java.util.List; import java.util.Scanner; public class Main { public static void main(String[] args) throws FileNotFoundException { new Main().run(); } void run() { Scanner sc = new Scanner(System.in); PrintWriter pw = new PrintWriter(System.out); long n = sc.nextLong(); ArrayList<int[]> list = new ArrayList<>(); HashMap<List<Integer>, Integer> index = new HashMap<>(); int idx = 0; for (int i = 0; i <= 2; ++i) { for (int j = 0; j <= 2; ++j) { for (int k = 0; k <= 2; ++k) { for (int l = 0; l <= 2; ++l) { if (!ok(new int[] { i, j, k, l })) continue; list.add(new int[] { i, j, k, l }); index.put(Arrays.asList(i, j, k, l), idx); ++idx; } } } } long[][] mat = new long[16][16]; // mat[x][y]=x->yへの遷移数 for (int i = 0; i < list.size(); ++i) { int[] cur = list.get(i); ArrayDeque<int[]> pend = new ArrayDeque<>(); ArrayDeque<int[]> pend2 = new ArrayDeque<>(); pend.add(cur); pend2.add(cur); mat[index.get(toList(cur))][index.get(toList(cur))]++; while (!pend.isEmpty()) { int[] p = pend.pollFirst(); int src = -1; for (int j = 0; j < 4; ++j) if (p[j] == 1) src = j; // 1を移動 for (int d = -1; d <= 1; d += 2) { int nsrc = src + d; if (!(0 <= nsrc && nsrc <= 3) || p[nsrc] == -1) continue; int[] dst = Arrays.copyOf(p, p.length); dst[nsrc] = 1; dst[src] = -1; for (int j = 0; j < 4; ++j) { if (dst[j] == 2 && p[nsrc] == 2) { dst[j] = 1; dst[nsrc] = -1; } } if (!ok(dst)) { throw new AssertionError(); } pend.add(dst); pend2.add(dst); dst = regulate(dst); mat[index.get(toList(dst))][index.get(toList(cur))]++; } // 2を伸ばす while (!pend2.isEmpty()) { int[] p2 = pend2.poll(); for (int j = 0; j < 4; ++j) { if (p2[j] != 2) continue; for (int d = -1; d <= 1; d += 2) { int nj = j + d; if (!(0 <= nj && nj < 4) || p2[nj] != 0) { continue; } int[] dst = Arrays.copyOf(p2, p2.length); dst[j] = -1; dst[nj] = 2; if (!ok(dst)) { throw new AssertionError(); } pend2.add(dst); dst = regulate(dst); mat[index.get(toList(dst))][index.get(toList(cur))]++; } } } // 2を生成 for (int j = 0; j < 4; ++j) { loop: for (int k = j + 1; k < 4; ++k) { for (int l = j; l <= k; ++l) { if (p[l] != 0) continue loop; } int[] dst = Arrays.copyOf(p, p.length); for (int l = j; l <= k; ++l) { dst[l] = -1; } dst[j] = 2; dst[k] = 2; if (!ok(dst)) { throw new AssertionError(); } dst = regulate(dst); mat[index.get(toList(dst))][index.get(toList(cur))]++; } } } } long[][] v = new long[16][1]; int curIdx = index.get(Arrays.asList(1, 0, 0, 0)); int lastIdx = index.get(Arrays.asList(0, 0, 0, 1)); v[curIdx][0]++; v = mul(pow(mat, n + 1), v); System.out.println(v[lastIdx][0]); } boolean ok(int[] arr) { int c2 = count(2, 0, 3, arr); if (!(c2 == 0 || c2 == 2)) return false; int c1 = count(1, 0, 3, arr); if (c1 != 1) return false; for (int i = 0; i < 4; ++i) { for (int j = i + 1; j < 4; ++j) { if (arr[i] != 2 || arr[j] != 2) continue; for (int k = i + 1; k < j; ++k) { if (arr[k] == 1) return false; } } } return true; } int count(int val, int s, int t, int[] arr) { int ret = 0; for (int i = s; i <= t; ++i) { if (arr[i] == val) ++ret; } return ret; } long[][] mul(long[][] a, long[][] b) { long[][] ret = new long[a.length][b[0].length]; for (int i = 0; i < a.length; ++i) { for (int j = 0; j < b[i].length; ++j) { for (int k = 0; k < a[0].length; ++k) { ret[i][j] += a[i][k] * b[k][j] % MODULO; ret[i][j] %= MODULO; } } } return ret; } long[][] pow(long[][] a, long n) { long[][] ret = new long[a.length][a.length]; for (int i = 0; i < a.length; ++i) { ret[i][i] = 1; } for (; n > 0; n >>= 1, a = mul(a, a)) { if (n % 2 == 1) { ret = mul(ret, a); } } return ret; } ArrayList<Integer> toList(int[] arr) { ArrayList<Integer> ret = new ArrayList<>(); for (int i = 0; i < arr.length; ++i) { ret.add(arr[i]); } return ret; } int[] regulate(int[] arr) { int[] ret = Arrays.copyOf(arr, arr.length); for (int i = 0; i < arr.length; ++i) { if (ret[i] == -1) ret[i] = 0; } return ret; } final long MODULO = 1_000_000_000 + 7; static void tr(Object... objects) { System.out.println(Arrays.deepToString(objects)); } }