結果

問題 No.505 カードの数式2
ユーザー hiromi_ayasehiromi_ayase
提出日時 2017-04-21 22:52:47
言語 Java21
(openjdk 21)
結果
WA  
実行時間 -
コード長 3,596 bytes
コンパイル時間 4,643 ms
コンパイル使用メモリ 74,456 KB
実行使用メモリ 51,384 KB
最終ジャッジ日時 2023-09-27 12:18:52
合計ジャッジ時間 4,536 ms
ジャッジサーバーID
(参考情報)
judge12 / judge11
このコードへのチャレンジ
(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 38 ms
47,304 KB
testcase_01 AC 35 ms
49,448 KB
testcase_02 AC 35 ms
49,252 KB
testcase_03 AC 36 ms
49,124 KB
testcase_04 AC 35 ms
49,256 KB
testcase_05 AC 34 ms
47,328 KB
testcase_06 AC 35 ms
49,260 KB
testcase_07 AC 34 ms
49,132 KB
testcase_08 AC 35 ms
49,120 KB
testcase_09 WA -
testcase_10 WA -
testcase_11 WA -
testcase_12 AC 35 ms
49,316 KB
testcase_13 WA -
testcase_14 WA -
testcase_15 AC 35 ms
49,232 KB
testcase_16 WA -
testcase_17 WA -
testcase_18 WA -
testcase_19 AC 36 ms
49,192 KB
testcase_20 AC 35 ms
49,172 KB
testcase_21 AC 35 ms
49,256 KB
testcase_22 WA -
testcase_23 WA -
testcase_24 WA -
testcase_25 WA -
testcase_26 WA -
testcase_27 AC 37 ms
47,388 KB
testcase_28 WA -
testcase_29 WA -
testcase_30 WA -
testcase_31 WA -
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ソースコード

diff #

import java.io.IOException;
import java.io.InputStream;
import java.util.NoSuchElementException;


public class Main {
  public static void main(String[] args) {
    FastScanner sc = new FastScanner();
    int N = sc.nextInt();
    int[] a = sc.nextIntList(N);


    long[][] dp = new long[N + 1][2];
    for (int i = 0; i < N; i ++) {
      long x1 = dp[i][0] * a[i]; 
      long x2 = dp[i][1] * a[i]; 
      long x3 = dp[i][0] + a[i]; 
      long x4 = dp[i][1] + a[i]; 
      long x5 = dp[i][0] - a[i]; 
      long x6 = dp[i][1] - a[i]; 
      
      dp[i + 1][0] = x1;
      dp[i + 1][1] = x1;

      dp[i + 1][0] = Math.max(dp[i + 1][0], x2);
      dp[i + 1][0] = Math.max(dp[i + 1][0], x3);
      dp[i + 1][0] = Math.max(dp[i + 1][0], x4);
      dp[i + 1][0] = Math.max(dp[i + 1][0], x5);
      dp[i + 1][0] = Math.max(dp[i + 1][0], x6);
      dp[i + 1][1] = Math.min(dp[i + 1][1], x2);
      dp[i + 1][1] = Math.min(dp[i + 1][1], x3);
      dp[i + 1][1] = Math.min(dp[i + 1][1], x4);
      dp[i + 1][1] = Math.min(dp[i + 1][1], x5);
      dp[i + 1][1] = Math.min(dp[i + 1][1], x6);
    }
    
    System.out.println(dp[N][0]);
  }

}


class FastScanner {
	public static String debug = null;

	private final InputStream in = System.in;
	private int ptr = 0;
	private int buflen = 0;
	private byte[] buffer = new byte[1024];
	private boolean eos = false;

	private boolean hasNextByte() {
		if (ptr < buflen) {
			return true;
		} else {
			ptr = 0;
			try {
				if (debug != null) {
					buflen = debug.length();
					buffer = debug.getBytes();
					debug = "";
					eos = true;
				} else {
					buflen = in.read(buffer);
				}
			} catch (IOException e) {
				e.printStackTrace();
			}
			if (buflen < 0) {
				eos = true;
				return false;
			} else 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 void skipUnprintable() {
		while (hasNextByte() && !isPrintableChar(buffer[ptr]))
			ptr++;
	}

	public boolean isEOS() {
		return this.eos;
	}

	public boolean hasNext() {
		skipUnprintable();
		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() {
		return (int) nextLong();
	}

	public long[] nextLongList(int n) {
		return nextLongTable(1, n)[0];
	}

	public int[] nextIntList(int n) {
		return nextIntTable(1, n)[0];
	}

	public long[][] nextLongTable(int n, int m) {
		long[][] ret = new long[n][m];
		for (int i = 0; i < n; i ++) {
			for (int j = 0; j < m; j ++) {
				ret[i][j] = nextLong();
			}
		}
		return ret;
	}

	public int[][] nextIntTable(int n, int m) {
		int[][] ret = new int[n][m];
		for (int i = 0; i < n; i ++) {
			for (int j = 0; j < m; j ++) {
				ret[i][j] = nextInt();
			}
		}
		return ret;
	}
}
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