結果
問題 | No.645 Count Permutation |
ユーザー | 👑 hos.lyric |
提出日時 | 2019-04-24 15:12:22 |
言語 | D (dmd 2.106.1) |
結果 |
AC
|
実行時間 | 63 ms / 2,000 ms |
コード長 | 3,325 bytes |
コンパイル時間 | 778 ms |
コンパイル使用メモリ | 119,916 KB |
実行使用メモリ | 58,192 KB |
最終ジャッジ日時 | 2024-06-22 00:54:18 |
合計ジャッジ時間 | 2,515 ms |
ジャッジサーバーID (参考情報) |
judge5 / judge1 |
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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 | 13 ms
10,744 KB |
testcase_01 | AC | 13 ms
11,964 KB |
testcase_02 | AC | 13 ms
10,684 KB |
testcase_03 | AC | 13 ms
10,528 KB |
testcase_04 | AC | 14 ms
11,716 KB |
testcase_05 | AC | 14 ms
12,124 KB |
testcase_06 | AC | 13 ms
11,960 KB |
testcase_07 | AC | 14 ms
11,940 KB |
testcase_08 | AC | 13 ms
11,520 KB |
testcase_09 | AC | 13 ms
11,792 KB |
testcase_10 | AC | 14 ms
12,460 KB |
testcase_11 | AC | 15 ms
12,528 KB |
testcase_12 | AC | 14 ms
13,892 KB |
testcase_13 | AC | 15 ms
15,088 KB |
testcase_14 | AC | 12 ms
11,188 KB |
testcase_15 | AC | 35 ms
29,900 KB |
testcase_16 | AC | 30 ms
24,336 KB |
testcase_17 | AC | 54 ms
48,444 KB |
testcase_18 | AC | 26 ms
22,560 KB |
testcase_19 | AC | 57 ms
52,280 KB |
testcase_20 | AC | 28 ms
24,848 KB |
testcase_21 | AC | 14 ms
12,496 KB |
testcase_22 | AC | 12 ms
11,432 KB |
testcase_23 | AC | 12 ms
11,100 KB |
testcase_24 | AC | 63 ms
58,192 KB |
testcase_25 | AC | 39 ms
34,200 KB |
testcase_26 | AC | 40 ms
35,976 KB |
testcase_27 | AC | 16 ms
14,144 KB |
testcase_28 | AC | 24 ms
21,984 KB |
testcase_29 | AC | 37 ms
30,700 KB |
testcase_30 | AC | 40 ms
37,464 KB |
testcase_31 | AC | 41 ms
36,144 KB |
testcase_32 | AC | 20 ms
16,460 KB |
testcase_33 | AC | 19 ms
16,812 KB |
ソースコード
import std.conv, std.functional, std.stdio, std.string; import std.algorithm, std.array, std.bigint, std.complex, std.container, std.math, std.numeric, std.range, 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)); } enum MO = 10L^^9 + 7; enum LIM = 3 * 10^^5; long[] inv, fac, invFac; void prepare() { inv = new long[LIM]; fac = new long[LIM]; invFac = new long[LIM]; inv[1] = 1; foreach (i; 2 .. LIM) { inv[i] = MO - ((MO / i) * inv[cast(size_t)(MO % i)]) % MO; } fac[0] = invFac[0] = 1; foreach (i; 1 .. LIM) { fac[i] = (fac[i - 1] * i) % MO; invFac[i] = (invFac[i - 1] * inv[i]) % MO; } } long binom(long n, long k) { if (0 <= k && k <= n) { assert(n < LIM); return fac[cast(size_t)(n)] * invFac[cast(size_t)(k)] % MO * invFac[cast(size_t)(n - k)] % MO; } else { return 0; } } void main() { /* debug { foreach (n; 1 .. 7) { int[int] cnt; int[] b = iota(n).array; do { int[] a = b.dup; foreach (i; 0 .. n - 1) { if (a[i] > a[i + 1]) { swap(a[i], a[i + 1]); } } int key; foreach (i; 0 .. n) { key += n^^i * a[i]; } ++cnt[key]; } while (b.nextPermutation); foreach (key; cnt.keys.sort) { writeln(iota(n).map!(i => key / n^^i % n), " ", cnt[key]); } } } */ prepare(); try { for (; ; ) { const N = readInt(); const L = readLong(); const R = readLong(); const logR = bsr(max(R, 1)); auto dp = new long[][](logR + 1, N + 1); dp[0][1] = 1; foreach (k; 1 .. logR + 1) { // dp[k][n] = Sum[1 <= i <= n - 1] ((n - 2)! / (i - 1)!) dp[k - 1][i] long sum = dp[k - 1][1]; foreach (n; 2 .. N + 1) { dp[k][n] = (fac[n - 2] * sum) % MO; sum += invFac[n - 1] * dp[k - 1][n]; sum %= MO; } } debug { if (N <= 10) { foreach (k; 0 .. logR + 1) { writeln(dp[k]); } } } long ans; if (L <= 0 && 0 <= R) { ans += (N - 1) * fac[N - 1]; ans %= MO; } foreach (k; 0 .. logR + 1) { if (L <= (1L << k) && (1L << k) <= R) { ans += dp[k][N]; ans %= MO; } } ans = (ans % MO + MO) % MO; writeln(ans); } } catch (EOFException e) { } }