結果
問題 | No.106 素数が嫌い!2 |
ユーザー | femto |
提出日時 | 2015-04-05 10:12:38 |
言語 | C#(csc) (csc 3.9.0) |
結果 |
AC
|
実行時間 | 115 ms / 5,000 ms |
コード長 | 4,264 bytes |
コンパイル時間 | 1,534 ms |
コンパイル使用メモリ | 110,208 KB |
実行使用メモリ | 29,696 KB |
最終ジャッジ日時 | 2024-07-04 02:02:36 |
合計ジャッジ時間 | 2,793 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge2 |
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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 | 66 ms
24,064 KB |
testcase_01 | AC | 29 ms
18,944 KB |
testcase_02 | AC | 27 ms
18,944 KB |
testcase_03 | AC | 27 ms
18,944 KB |
testcase_04 | AC | 67 ms
24,192 KB |
testcase_05 | AC | 112 ms
29,696 KB |
testcase_06 | AC | 112 ms
29,696 KB |
testcase_07 | AC | 107 ms
29,696 KB |
testcase_08 | AC | 31 ms
19,032 KB |
testcase_09 | AC | 33 ms
19,072 KB |
testcase_10 | AC | 110 ms
29,440 KB |
testcase_11 | AC | 60 ms
23,552 KB |
testcase_12 | AC | 115 ms
29,312 KB |
testcase_13 | AC | 27 ms
19,072 KB |
testcase_14 | AC | 27 ms
19,072 KB |
testcase_15 | AC | 27 ms
19,072 KB |
コンパイルメッセージ
Microsoft (R) Visual C# Compiler version 3.9.0-6.21124.20 (db94f4cc) Copyright (C) Microsoft Corporation. All rights reserved.
ソースコード
using System; using System.Diagnostics; using System.Collections.Generic; using System.Linq; using Enu = System.Linq.Enumerable; class Solution { int N, K; void calc() { rio(out N, out K); var primes = sieveOfEratosthenes(N); int[] count = new int[N + 1]; foreach (var p in primes) { for (int i = p; i <= N; i += p) { count[i]++; } } var ans = count.Count(e => e >= K); Console.WriteLine(ans); } public static List<int> sieveOfEratosthenes(int n) { List<int> primes = new List<int>(); bool[] isPrime = Enumerable.Repeat(true, n + 1).ToArray(); isPrime[0] = isPrime[1] = false; for (int i = 2; i <= n; i++) { if (isPrime[i]) { primes.Add(i); for (int j = 2 * i; j <= n; j += i) isPrime[j] = false; } } return primes; } static void Main(string[] args) { new Solution().calc(); } #region static int ri() { return int.Parse(Console.ReadLine()); } static int[] ria(int n) { if (n <= 0) { Console.ReadLine(); return new int[0]; } else return Console.ReadLine().Trim().Split(' ').Select(int.Parse).ToArray(); } static void rio(out int p1) { p1 = ri(); } static void rio(out int p1, out int p2) { var r = ria(2); p1 = r[0]; p2 = r[1]; } static void rio(out int p1, out int p2, out int p3) { var r = ria(3); p1 = r[0]; p2 = r[1]; p3 = r[2]; } static void rio(out int p1, out int p2, out int p3, out int p4) { var r = ria(4); p1 = r[0]; p2 = r[1]; p3 = r[2]; p4 = r[3]; } static void rio(out int p1, out int p2, out int p3, out int p4, out int p5) { var r = ria(5); p1 = r[0]; p2 = r[1]; p3 = r[2]; p4 = r[3]; p5 = r[4]; } static long rl() { return long.Parse(Console.ReadLine()); } static long[] rla(int n) { if (n <= 0) { Console.ReadLine(); return new long[0]; } else return Console.ReadLine().Trim().Split(' ').Select(long.Parse).ToArray(); } static void rlo(out long p1) { p1 = rl(); } static void rlo(out long p1, out long p2) { var r = rla(2); p1 = r[0]; p2 = r[1]; } static void rlo(out long p1, out long p2, out long p3) { var r = rla(3); p1 = r[0]; p2 = r[1]; p3 = r[2]; } static void rlo(out long p1, out long p2, out long p3, out long p4) { var r = rla(4); p1 = r[0]; p2 = r[1]; p3 = r[2]; p4 = r[3]; } static void rlo(out long p1, out long p2, out long p3, out long p4, out long p5) { var r = rla(5); p1 = r[0]; p2 = r[1]; p3 = r[2]; p4 = r[3]; p5 = r[4]; } static double rd() { return double.Parse(Console.ReadLine()); } static double[] rda(int n) { if (n <= 0) { Console.ReadLine(); return new double[0]; } else return Console.ReadLine().Trim().Split(' ').Select(double.Parse).ToArray(); } static void rdo(out double p1) { p1 = rd(); } static void rdo(out double p1, out double p2) { var r = rda(2); p1 = r[0]; p2 = r[1]; } static void rdo(out double p1, out double p2, out double p3) { var r = rda(3); p1 = r[0]; p2 = r[1]; p3 = r[2]; } static void rdo(out double p1, out double p2, out double p3, out double p4) { var r = rda(4); p1 = r[0]; p2 = r[1]; p3 = r[2]; p4 = r[3]; } static void rdo(out double p1, out double p2, out double p3, out double p4, out double p5) { var r = rda(5); p1 = r[0]; p2 = r[1]; p3 = r[2]; p4 = r[3]; p5 = r[4]; } static void swap<T>(ref T x, ref T y) { T temp = x; x = y; y = temp; } static void wa1<T>(T[] a) { Debug.WriteLine(string.Join(" ", a)); } static void wa2<T>(T[][] a) { foreach (var row in a) { Debug.WriteLine(String.Join(" ", row)); } } [DebuggerDisplay("{x} , {y}")] class point { public int x, y; public point(int x, int y) { this.x = x; this.y = y; } } #endregion } static class Extention { public static T[][] ToJagArray<T>(this T[,] a) { int n = a.GetLength(0), m = a.GetLength(1); var ret = new T[n][]; for (int i = 0; i < n; i++) { ret[i] = new T[m]; for (int j = 0; j < m; j++) { ret[i][j] = a[i, j]; } } return ret; } }