結果

問題 No.366 ロボットソート
ユーザー ぴろずぴろず
提出日時 2016-04-29 22:36:56
言語 Java21
(openjdk 21)
結果
AC  
実行時間 84 ms / 2,000 ms
コード長 4,497 bytes
コンパイル時間 3,294 ms
コンパイル使用メモリ 79,756 KB
実行使用メモリ 37,952 KB
最終ジャッジ日時 2024-06-09 10:21:09
合計ジャッジ時間 4,747 ms
ジャッジサーバーID
（参考情報） 		judge1 / judge3
このコードへのチャレンジ
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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 51 ms
36,944 KB
testcase_01 AC 48 ms
36,508 KB
testcase_02 AC 51 ms
36,792 KB
testcase_03 AC 50 ms
36,780 KB
testcase_04 AC 52 ms
36,704 KB
testcase_05 AC 51 ms
36,876 KB
testcase_06 AC 49 ms
36,660 KB
testcase_07 AC 50 ms
36,804 KB
testcase_08 AC 52 ms
36,808 KB
testcase_09 AC 52 ms
36,680 KB
testcase_10 AC 49 ms
36,552 KB
testcase_11 AC 54 ms
36,636 KB
testcase_12 AC 56 ms
37,180 KB
testcase_13 AC 53 ms
36,744 KB
testcase_14 AC 53 ms
36,664 KB
testcase_15 AC 53 ms
36,936 KB
testcase_16 AC 54 ms
36,472 KB
testcase_17 AC 58 ms
36,680 KB
testcase_18 AC 74 ms
37,656 KB
testcase_19 AC 67 ms
37,192 KB
testcase_20 AC 50 ms
36,704 KB
testcase_21 AC 84 ms
37,824 KB
testcase_22 AC 81 ms
37,952 KB
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ソースコード

diff # 

package no366;

import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.InputMismatchException;
import java.util.NoSuchElementException;

public class Main {

	public static void main(String[] args) {
		IO io = new IO();
		int n = io.nextInt();
		int k = io.nextInt();
		int[] a = io.nextIntArray(n);
		long cost = 0;
		for(int i=0;i<k;i++) {
			ArrayList<Integer> al = new ArrayList<>();
			for(int j=i;j<n;j+=k) {
				al.add(a[j]);
			}
			cost += inversionNumber(al);
			al.sort(null);
			for(int j=0;j<al.size();j++) {
				a[i+j*k] = al.get(j);
			}
		}
		for(int i=0;i<n-1;i++) {
			if (a[i] >= a[i+1]) {
				System.out.println("-1");
				return;
			}
		}
		System.out.println(cost);
	}
	
	//naive
	public static long inversionNumber(ArrayList<Integer> al) {
		long count = 0;
		int n = al.size();
		for(int i=0;i<n;i++) {
			for(int j=i+1;j<n;j++) {
				if (al.get(i) > al.get(j)) {
					count++;
				}
			}
		}
		return count;
	}


}
class IO extends PrintWriter {
	private final InputStream in;
	private final byte[] buffer = new byte[1024];
	private int ptr = 0;
	private int buflen = 0;
	
	public IO() { this(System.in);}
	public IO(InputStream source) { super(System.out); this.in = source;}
	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 static boolean isPrintableChar(int c) { return 33 <= c && c <= 126;}
	private static boolean isNewLine(int c) { return c == '\n' || c == '\r';}
	public boolean hasNext() { while(hasNextByte() && !isPrintableChar(buffer[ptr])) ptr++; return hasNextByte();}
	public boolean hasNextLine() { while(hasNextByte() && isNewLine(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 char[] nextCharArray(int len) {
		if (!hasNext()) {
			throw new NoSuchElementException();
		}
		char[] s = new char[len];
		int i = 0;
		int b = readByte();
		while(isPrintableChar(b)) {
			if (i == len) {
				throw new InputMismatchException();
			}
			s[i++] = (char) b;
			b = readByte();
		}
		return s;
	}
	public String nextLine() {
		if (!hasNextLine()) {
			throw new NoSuchElementException();
		}
		StringBuilder sb = new StringBuilder();
		int b = readByte();
		while(!isNewLine(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 char nextChar() {
		if (!hasNext()) {
			throw new NoSuchElementException();
		}
		return (char) readByte();
	}
	public double nextDouble() { return Double.parseDouble(next());}
	public int[] nextIntArray(int n) { int[] a = new int[n]; for(int i=0;i<n;i++) a[i] = nextInt(); return a;}
	public long[] nextLongArray(int n) { long[] a = new long[n]; for(int i=0;i<n;i++) a[i] = nextLong(); return a;}
	public double[] nextDoubleArray(int n) { double[] a = new double[n]; for(int i=0;i<n;i++) a[i] = nextDouble(); return a;}
	public void nextIntArrays(int[]... a) { for(int i=0;i<a[0].length;i++) for(int j=0;j<a.length;j++) a[j][i] = nextInt();}
	public int[][] nextIntMatrix(int n,int m) { int[][] a = new int[n][]; for(int i=0;i<n;i++) a[i] = nextIntArray(m); return a;}
	public char[][] nextCharMap(int n,int m) { char[][] a = new char[n][]; for(int i=0;i<n;i++) a[i] = nextCharArray(m); return a;}
	public void close() { super.close(); try {in.close();} catch (IOException e) {}}
}
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