結果
問題 | No.907 Continuous Kadomatu |
ユーザー | 37zigen |
提出日時 | 2019-04-20 16:29:39 |
言語 | Java21 (openjdk 21) |
結果 |
RE
|
実行時間 | - |
コード長 | 2,732 bytes |
コンパイル時間 | 2,147 ms |
コンパイル使用メモリ | 79,632 KB |
実行使用メモリ | 58,620 KB |
最終ジャッジ日時 | 2024-10-13 12:54:40 |
合計ジャッジ時間 | 9,721 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 | 114 ms
40,192 KB |
testcase_01 | AC | 118 ms
40,064 KB |
testcase_02 | AC | 115 ms
40,448 KB |
testcase_03 | AC | 125 ms
41,532 KB |
testcase_04 | AC | 121 ms
41,216 KB |
testcase_05 | AC | 196 ms
41,892 KB |
testcase_06 | AC | 133 ms
41,336 KB |
testcase_07 | AC | 187 ms
41,388 KB |
testcase_08 | AC | 189 ms
42,240 KB |
testcase_09 | AC | 187 ms
42,276 KB |
testcase_10 | AC | 224 ms
42,156 KB |
testcase_11 | AC | 237 ms
41,976 KB |
testcase_12 | AC | 354 ms
43,244 KB |
testcase_13 | AC | 370 ms
43,200 KB |
testcase_14 | AC | 424 ms
43,772 KB |
testcase_15 | AC | 411 ms
43,240 KB |
testcase_16 | AC | 404 ms
43,476 KB |
testcase_17 | AC | 421 ms
43,052 KB |
testcase_18 | AC | 385 ms
43,084 KB |
testcase_19 | AC | 437 ms
43,172 KB |
testcase_20 | RE | - |
testcase_21 | AC | 146 ms
42,136 KB |
testcase_22 | AC | 148 ms
41,920 KB |
testcase_23 | RE | - |
testcase_24 | RE | - |
testcase_25 | AC | 121 ms
41,528 KB |
testcase_26 | AC | 124 ms
41,372 KB |
testcase_27 | AC | 124 ms
41,168 KB |
testcase_28 | AC | 124 ms
41,216 KB |
testcase_29 | AC | 128 ms
41,528 KB |
ソースコード
import java.util.Arrays; import java.util.HashSet; import java.util.Scanner; class Main { public static void main(String[] args) { new Main().run(); } final long MOD = 1_000_000_000 + 7; long[] karamatsu_prob = new long[200]; long[] fac = new long[200]; long[] ifac = new long[200]; long pow(long a, long n) { long ret = 1; for (; n > 0; n >>= 1, a = a * a % MOD) { if (n % 2 == 1) { ret = ret * a % MOD; } } return ret; } long inv(long a) { return pow(a, MOD - 2); } { fac[0] = fac[1] = 1; ifac[0] = ifac[1] = 1; for (int i = 2; i < fac.length; ++i) fac[i] = fac[i - 1] * i % MOD; for (int i = 2; i < ifac.length; ++i) { ifac[i] = inv(fac[i]); } } long comb(int n, int k) { return fac[n] * ifac[k] % MOD * ifac[n - k] % MOD; } { karamatsu_prob[0] = 1; karamatsu_prob[1] = 1; for (int i = 2; i < karamatsu_prob.length; ++i) { for (int j = 0; j <= i - 1; j += 2) { karamatsu_prob[i] += karamatsu_prob[j] * karamatsu_prob[i - j - 1] % MOD * comb(i - 1, j) % MOD; karamatsu_prob[i] %= MOD; } } for (int i = 0; i < karamatsu_prob.length; ++i) { karamatsu_prob[i] = karamatsu_prob[i] * ifac[i] % MOD; } } void run() { Scanner sc = new Scanner(System.in); int N = sc.nextInt(); ++N; long[] l = new long[N]; long[] r = new long[N]; HashSet<Long> set = new HashSet<>(); for (int i = 1; i < N; ++i) { l[i] = sc.nextLong(); r[i] = sc.nextLong(); set.add(l[i]); set.add(r[i]); // [l[i],r[i]) } set.add((long) 1e9); set.add((long) 1e9 + 1); l[0] = (long) 1e9; r[0] = (long) 1e9 + 1; long[] a = new long[set.size()]; int sz = 0; for (long v : set) { a[sz] = v; ++sz; } Arrays.sort(a); // [a[i],a[i+1]] long[][] p = new long[N][sz]; for (int i = 0; i < N; ++i) { for (int j = 0; j + 1 < sz; ++j) { if (!(l[i] <= a[j] && a[j + 1] <= r[i])) continue; p[i][j] = (a[j + 1] - a[j]) * inv(r[i] - l[i]) % MOD; } } long[][] prob = new long[N][sz]; prob[0][sz - 2] = 1; for (int t = 0; t + 1 < N; ++t) { for (int src = 0; src + 1 < sz; ++src) { for (int dst = 0; dst + 1 < sz; ++dst) { if ((t % 2 == 1 && src >= dst) || (t % 2 == 0 && src <= dst)) continue; long prob_cur = prob[t][src]; for (int i = 1; t + i < N; ++i) { prob_cur = prob_cur * p[t + i][dst] % MOD; if (prob_cur == 0) break; prob[t + i][dst] += prob_cur * karamatsu_prob[i] % MOD; prob[t + i][dst] %= MOD; } } } } long ans = 0; for (int i = 0; i < prob[N - 1].length; ++i) ans = (ans + prob[N - 1][i]) % MOD; System.out.println(ans); } void tr(Object... objects) { System.out.println(Arrays.deepToString(objects)); } }