結果
問題 | No.696 square1001 and Permutation 5 |
ユーザー | 37zigen |
提出日時 | 2018-06-09 04:24:03 |
言語 | Java21 (openjdk 21) |
結果 |
AC
|
実行時間 | 1,853 ms / 10,000 ms |
コード長 | 3,361 bytes |
コンパイル時間 | 2,340 ms |
コンパイル使用メモリ | 78,960 KB |
実行使用メモリ | 66,384 KB |
最終ジャッジ日時 | 2024-06-30 12:24:16 |
合計ジャッジ時間 | 11,868 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge3 |
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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 | 1,832 ms
66,384 KB |
testcase_01 | AC | 54 ms
37,060 KB |
testcase_02 | AC | 55 ms
36,536 KB |
testcase_03 | AC | 60 ms
36,896 KB |
testcase_04 | AC | 86 ms
38,748 KB |
testcase_05 | AC | 134 ms
41,852 KB |
testcase_06 | AC | 193 ms
44,816 KB |
testcase_07 | AC | 300 ms
45,308 KB |
testcase_08 | AC | 503 ms
50,780 KB |
testcase_09 | AC | 929 ms
57,856 KB |
testcase_10 | AC | 1,853 ms
65,120 KB |
testcase_11 | AC | 852 ms
63,224 KB |
testcase_12 | AC | 51 ms
37,020 KB |
testcase_13 | AC | 52 ms
36,904 KB |
ソースコード
import java.io.IOException; import java.io.InputStream; import java.math.BigInteger; import java.util.Arrays; import java.util.NoSuchElementException; import java.util.Scanner; public class Main { public static void main(String[] args) { new Main().run(); } void run() { FastScanner sc = new FastScanner(); int n = sc.nextInt(); int[] p = new int[n]; for (int i = 0; i < n; ++i) { p[i] = sc.nextInt(); } BIT bit = new BIT(n + 1); for (int i = 1; i <= n; ++i) { bit.add(i, 1); } coe = new long[n]; for (int i = 0; i < n; ++i) { int v = bit.sum(1, p[i]); coe[n - 1 - i] = v; bit.add(p[i], -1); } System.out.println(dfs(0, n)[1].add(BigInteger.ONE)); } // [l,r) BigInteger[] dfs(int l, int r) { if (r - l == 1) { return new BigInteger[] { BigInteger.valueOf(l == 0 ? 1 : l), BigInteger.valueOf(l).multiply(BigInteger.valueOf(coe[l])) }; } BigInteger[] lb = dfs(l, (l + r) / 2); BigInteger[] rb = dfs((l + r) / 2, r); return new BigInteger[] { lb[0].multiply(rb[0]), lb[1].add(rb[1].multiply(lb[0])) }; } long[] coe; class BIT { int n; int[] a; public BIT(int n_) { n = n_; a = new int[n + 1]; } void add(int k, int add) { ++k; while (k < a.length) { a[k] += add; k += k & -k; } } int sum(int k) { ++k; int ret = 0; while (k > 0) { ret += a[k]; k -= k & -k; } return ret; } int sum(int a, int b) { return sum(b - 1) - sum(a - 1); } } class FastScanner { private final InputStream in = System.in; private final byte[] buffer = new byte[1024]; private int ptr = 0; private int buflen = 0; private boolean hasNextByte() { if (ptr < buflen) { return true; } else { ptr = 0; try { buflen = in.read(buffer); } catch (IOException e) { e.printStackTrace(); } if (buflen <= 0) { return false; } } return true; } private int readByte() { if (hasNextByte()) return buffer[ptr++]; else return -1; } private boolean isPrintableChar(int c) { return 33 <= c && c <= 126; } public boolean hasNext() { while (hasNextByte() && !isPrintableChar(buffer[ptr])) ptr++; return hasNextByte(); } public String next() { if (!hasNext()) throw new NoSuchElementException(); StringBuilder sb = new StringBuilder(); int b = readByte(); while (isPrintableChar(b)) { sb.appendCodePoint(b); b = readByte(); } return sb.toString(); } public long nextLong() { if (!hasNext()) throw new NoSuchElementException(); long n = 0; boolean minus = false; int b = readByte(); if (b == '-') { minus = true; b = readByte(); } if (b < '0' || '9' < b) { throw new NumberFormatException(); } while (true) { if ('0' <= b && b <= '9') { n *= 10; n += b - '0'; } else if (b == -1 || !isPrintableChar(b)) { return minus ? -n : n; } else { throw new NumberFormatException(); } b = readByte(); } } public int nextInt() { long nl = nextLong(); if (nl < Integer.MIN_VALUE || nl > Integer.MAX_VALUE) throw new NumberFormatException(); return (int) nl; } public double nextDouble() { return Double.parseDouble(next()); } } void tr(Object... objects) { System.out.println(Arrays.deepToString(objects)); } }