結果
問題 | No.2130 分配方法の数え上げ mod 998244353 |
ユーザー | hiromi_ayase |
提出日時 | 2022-11-25 21:48:30 |
言語 | Java21 (openjdk 21) |
結果 |
WA
|
実行時間 | - |
コード長 | 3,409 bytes |
コンパイル時間 | 2,538 ms |
コンパイル使用メモリ | 83,224 KB |
実行使用メモリ | 38,560 KB |
最終ジャッジ日時 | 2024-10-02 04:24:06 |
合計ジャッジ時間 | 6,237 ms |
ジャッジサーバーID (参考情報) |
judge3 / 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 | 73 ms
38,052 KB |
testcase_01 | AC | 73 ms
38,432 KB |
testcase_02 | AC | 75 ms
38,344 KB |
testcase_03 | AC | 73 ms
38,016 KB |
testcase_04 | AC | 73 ms
38,112 KB |
testcase_05 | AC | 72 ms
38,364 KB |
testcase_06 | AC | 72 ms
38,256 KB |
testcase_07 | AC | 71 ms
38,104 KB |
testcase_08 | AC | 73 ms
37,944 KB |
testcase_09 | AC | 74 ms
38,140 KB |
testcase_10 | AC | 74 ms
38,140 KB |
testcase_11 | AC | 77 ms
38,364 KB |
testcase_12 | AC | 77 ms
38,380 KB |
testcase_13 | AC | 78 ms
38,176 KB |
testcase_14 | AC | 78 ms
37,944 KB |
testcase_15 | AC | 77 ms
38,172 KB |
testcase_16 | AC | 79 ms
38,052 KB |
testcase_17 | AC | 78 ms
38,560 KB |
testcase_18 | AC | 79 ms
38,384 KB |
testcase_19 | AC | 82 ms
38,320 KB |
testcase_20 | AC | 72 ms
38,212 KB |
testcase_21 | WA | - |
testcase_22 | WA | - |
testcase_23 | WA | - |
testcase_24 | WA | - |
testcase_25 | WA | - |
testcase_26 | WA | - |
testcase_27 | WA | - |
testcase_28 | WA | - |
testcase_29 | WA | - |
testcase_30 | AC | 69 ms
38,432 KB |
testcase_31 | AC | 69 ms
38,104 KB |
testcase_32 | AC | 71 ms
38,188 KB |
testcase_33 | AC | 73 ms
37,992 KB |
testcase_34 | WA | - |
testcase_35 | WA | - |
testcase_36 | WA | - |
testcase_37 | WA | - |
ソースコード
import java.util.*; @SuppressWarnings("unused") public class Main { private static void solve() { long n = ni(); int m = ni(); int mod = 998244353; if (n < m) { System.out.println(0); return; } long ret = pow(2, n, mod);; // nCm + nCm+1 + nCm+2 ... // = 2^n - nC0 - nC1 - .. - nCm-1 long x = 1; for (int i = 0; i < m; i ++) { ret = (ret + mod - x) % mod; x *= (n + mod - i) % mod; x %= mod; x *= inv(i + 1, mod); x %= mod; } System.out.println(ret); } public static long inv(long a, int p) { long ret = 1; long mul = a; for (long n = p - 2; n > 0; n >>>= 1) { if ((n & 1) == 1) ret = ret * mul % p; mul = mul * mul % p; } return ret; } public static long pow(long x, long n, long m) { assert (n >= 0 && m >= 1); long ans = 1; while (n > 0) { if (n % 2 == 1) ans = (ans * x) % m; x = (x * x) % m; n /= 2; } return ans; } public static void main(String[] args) { new Thread(null, new Runnable() { @Override public void run() { long start = System.currentTimeMillis(); String debug = args.length > 0 ? args[0] : null; if (debug != null) { try { is = java.nio.file.Files.newInputStream(java.nio.file.Paths.get(debug)); } catch (Exception e) { throw new RuntimeException(e); } } reader = new java.io.BufferedReader(new java.io.InputStreamReader(is), 32768); solve(); out.flush(); tr((System.currentTimeMillis() - start) + "ms"); } }, "", 64000000).start(); } private static java.io.InputStream is = System.in; private static java.io.PrintWriter out = new java.io.PrintWriter(System.out); private static java.util.StringTokenizer tokenizer = null; private static java.io.BufferedReader reader; public static String next() { while (tokenizer == null || !tokenizer.hasMoreTokens()) { try { tokenizer = new java.util.StringTokenizer(reader.readLine()); } catch (Exception e) { throw new RuntimeException(e); } } return tokenizer.nextToken(); } private static double nd() { return Double.parseDouble(next()); } private static long nl() { return Long.parseLong(next()); } private static int[] na(int n) { int[] a = new int[n]; for (int i = 0; i < n; i++) a[i] = ni(); return a; } private static char[] ns() { return next().toCharArray(); } private static long[] nal(int n) { long[] a = new long[n]; for (int i = 0; i < n; i++) a[i] = nl(); return a; } private static int[][] ntable(int n, int m) { int[][] table = new int[n][m]; for (int i = 0; i < n; i++) { for (int j = 0; j < m; j++) { table[i][j] = ni(); } } return table; } private static int[][] nlist(int n, int m) { int[][] table = new int[m][n]; for (int i = 0; i < n; i++) { for (int j = 0; j < m; j++) { table[j][i] = ni(); } } return table; } private static int ni() { return Integer.parseInt(next()); } private static void tr(Object... o) { if (is != System.in) System.out.println(java.util.Arrays.deepToString(o)); } }