結果
問題 | No.831 都市めぐり |
ユーザー | hiromi_ayase |
提出日時 | 2019-05-24 23:38:38 |
言語 | Java21 (openjdk 21) |
結果 |
AC
|
実行時間 | 88 ms / 2,000 ms |
コード長 | 2,880 bytes |
コンパイル時間 | 2,832 ms |
コンパイル使用メモリ | 82,576 KB |
実行使用メモリ | 68,996 KB |
最終ジャッジ日時 | 2024-09-17 12:51:01 |
合計ジャッジ時間 | 4,524 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge6 |
(要ログイン)
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 | 64 ms
51,520 KB |
testcase_01 | AC | 64 ms
51,108 KB |
testcase_02 | AC | 64 ms
51,064 KB |
testcase_03 | AC | 68 ms
50,992 KB |
testcase_04 | AC | 68 ms
51,400 KB |
testcase_05 | AC | 69 ms
51,372 KB |
testcase_06 | AC | 68 ms
51,080 KB |
testcase_07 | AC | 71 ms
50,988 KB |
testcase_08 | AC | 69 ms
51,316 KB |
testcase_09 | AC | 70 ms
51,404 KB |
testcase_10 | AC | 69 ms
51,060 KB |
testcase_11 | AC | 69 ms
51,256 KB |
testcase_12 | AC | 71 ms
51,448 KB |
testcase_13 | AC | 77 ms
51,848 KB |
testcase_14 | AC | 73 ms
51,632 KB |
testcase_15 | AC | 83 ms
58,044 KB |
testcase_16 | AC | 75 ms
53,656 KB |
testcase_17 | AC | 78 ms
57,728 KB |
testcase_18 | AC | 84 ms
64,888 KB |
testcase_19 | AC | 87 ms
68,996 KB |
testcase_20 | AC | 88 ms
68,900 KB |
ソースコード
public class Main { private static void solve() { int n = ni(); System.out.println(solve(n)); } private static long solve(int n) { if (n == 1) return 0; long[] a = new long[n]; int s = 1; int t = n; for (int l = 0, r = n - 1; l <= r; l ++, r --) { if (l % 2 == 0) { a[l] = s ++; a[r] = t --; } else { a[l] = t --; a[r] = s ++; } } long now = 0; for (int i = 0; i < n; i++) { now += a[i] * a[(i + 1) % n]; } return now; } 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)); } }