結果
問題 | No.21 平均の差 |
ユーザー | fujisu |
提出日時 | 2015-02-13 15:25:32 |
言語 | Java21 (openjdk 21) |
結果 |
AC
|
実行時間 | 79 ms / 5,000 ms |
コード長 | 3,170 bytes |
コンパイル時間 | 2,194 ms |
コンパイル使用メモリ | 78,164 KB |
実行使用メモリ | 51,972 KB |
最終ジャッジ日時 | 2024-06-23 19:44:07 |
合計ジャッジ時間 | 3,338 ms |
ジャッジサーバーID (参考情報) |
judge5 / judge4 |
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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 | 54 ms
50,192 KB |
testcase_01 | AC | 58 ms
50,272 KB |
testcase_02 | AC | 79 ms
50,380 KB |
testcase_03 | AC | 53 ms
49,912 KB |
testcase_04 | AC | 64 ms
50,020 KB |
testcase_05 | AC | 55 ms
51,972 KB |
testcase_06 | AC | 54 ms
50,196 KB |
testcase_07 | AC | 54 ms
50,196 KB |
testcase_08 | AC | 56 ms
50,196 KB |
testcase_09 | AC | 66 ms
50,480 KB |
ソースコード
import java.io.IOException; import java.util.InputMismatchException; public class Main { int n, m; int[] a; int max; void choice(int k, int[] group, int p) { p = Math.min(p, m - 1); if (n <= k) { if (!check(group)) { return; } max = Math.max(max, calc(group)); } else { for (int i = 0; i <= p; i++) { group[k] = i; choice(k + 1, group, Math.max(p, i + 1)); } } } boolean check(int[] group) { int[] cnt = new int[m]; for (int i = 0; i < n; i++) { cnt[group[i]]++; } for (int i = 0; i < m; i++) { if (cnt[i] == 0) { return false; } } return true; } int calc(int[] group) { int[] sum = new int[m]; int[] cnt = new int[m]; for (int i = 0; i < n; i++) { sum[group[i]] += a[i]; cnt[group[i]]++; } double max = 0; double min = 10000; for (int i = 0; i < m; i++) { double ave = 1.0 * sum[i] / cnt[i]; max = Math.max(max, ave); min = Math.min(min, ave); } double diff = max - min; int ret = (int) Math.ceil(diff); return ret; } void run() { MyScanner sc = new MyScanner(); n = sc.nextInt(); m = sc.nextInt(); a = sc.nextIntArray(n); max = 0; choice(0, new int[n], 0); System.out.println(max); } public static void main(String[] args) { new Main().run(); } public void mapDebug(int[][] a) { System.out.println("--------map display---------"); for (int i = 0; i < a.length; i++) { for (int j = 0; j < a[i].length; j++) { System.out.printf("%3d ", a[i][j]); } System.out.println(); } System.out.println("----------------------------" + '\n'); } class MyScanner { int read() { try { return System.in.read(); } catch (IOException e) { throw new InputMismatchException(); } } boolean isSpaceChar(int c) { return c == ' ' || c == '\n' || c == '\r' || c == '\t' || c == -1; } boolean isEndline(int c) { return c == '\n' || c == '\r' || c == -1; } int nextInt() { return Integer.parseInt(next()); } int[] nextIntArray(int n) { int[] array = new int[n]; for (int i = 0; i < n; i++) array[i] = nextInt(); return array; } long nextLong() { return Long.parseLong(next()); } long[] nextLongArray(int n) { long[] array = new long[n]; for (int i = 0; i < n; i++) array[i] = nextLong(); return array; } double nextDouble() { return Double.parseDouble(next()); } double[] nextDoubleArray(int n) { double[] array = new double[n]; for (int i = 0; i < n; i++) array[i] = nextDouble(); return array; } String next() { int c = read(); while (isSpaceChar(c)) c = read(); StringBuilder res = new StringBuilder(); do { res.appendCodePoint(c); c = read(); } while (!isSpaceChar(c)); return res.toString(); } String[] nextStringArray(int n) { String[] array = new String[n]; for (int i = 0; i < n; i++) array[i] = next(); return array; } String nextLine() { int c = read(); while (isEndline(c)) c = read(); StringBuilder res = new StringBuilder(); do { res.appendCodePoint(c); c = read(); } while (!isEndline(c)); return res.toString(); } } }