結果

問題 No.1041 直線大学
ユーザー k_6101k_6101
提出日時 2020-05-01 22:21:13
言語 Java21
(openjdk 21)
結果
AC  
実行時間 70 ms / 2,000 ms
コード長 4,469 bytes
コンパイル時間 1,967 ms
コンパイル使用メモリ 82,288 KB
実行使用メモリ 38,072 KB
最終ジャッジ日時 2024-04-28 00:13:47
合計ジャッジ時間 5,032 ms
ジャッジサーバーID
（参考情報） 		judge4 / judge1
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 41 ms
36,840 KB
testcase_01 AC 42 ms
36,832 KB
testcase_02 AC 43 ms
36,764 KB
testcase_03 AC 42 ms
36,920 KB
testcase_04 AC 40 ms
36,832 KB
testcase_05 AC 42 ms
36,920 KB
testcase_06 AC 42 ms
36,696 KB
testcase_07 AC 41 ms
36,464 KB
testcase_08 AC 43 ms
36,708 KB
testcase_09 AC 42 ms
36,428 KB
testcase_10 AC 70 ms
37,512 KB
testcase_11 AC 68 ms
38,072 KB
testcase_12 AC 68 ms
37,348 KB
testcase_13 AC 43 ms
36,796 KB
testcase_14 AC 49 ms
36,800 KB
testcase_15 AC 42 ms
36,424 KB
testcase_16 AC 48 ms
36,768 KB
testcase_17 AC 43 ms
36,856 KB
testcase_18 AC 45 ms
36,660 KB
testcase_19 AC 49 ms
36,556 KB
testcase_20 AC 42 ms
36,744 KB
testcase_21 AC 56 ms
36,916 KB
testcase_22 AC 57 ms
36,920 KB
testcase_23 AC 69 ms
37,720 KB
testcase_24 AC 69 ms
37,524 KB
testcase_25 AC 57 ms
37,184 KB
testcase_26 AC 43 ms
36,848 KB
testcase_27 AC 44 ms
36,432 KB
testcase_28 AC 42 ms
36,808 KB
testcase_29 AC 42 ms
36,592 KB
testcase_30 AC 43 ms
36,744 KB
testcase_31 AC 42 ms
36,988 KB
testcase_32 AC 42 ms
36,888 KB
testcase_33 AC 43 ms
36,860 KB
testcase_34 AC 42 ms
36,960 KB
testcase_35 AC 43 ms
36,896 KB
testcase_36 AC 42 ms
36,592 KB
testcase_37 AC 40 ms
36,768 KB
testcase_38 AC 68 ms
37,600 KB
testcase_39 AC 43 ms
36,828 KB
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ソースコード

diff # 

import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.net.ConnectException;
import java.rmi.dgc.Lease;
import java.util.ArrayDeque;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.Deque;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.NoSuchElementException;
import java.util.Objects;
import java.util.Set;
import java.util.Stack;
import java.util.TreeMap;
import java.util.TreeSet;

import static java.util.Comparator.*;

public class Main {
	public static void main(String[] args) {
		Main main = new Main();
		main.solve();
		main.out.close();
	}

	// ======================================================================
	public void solve() {
		int N = ni();
		int[] X = new int[N];
		int[] Y = new int[N];
		for (int i = 0; i < N; i++) {
			X[i] = ni();
			Y[i] = ni();
		}
		int ans = 0, cnt, a, b;
		for (int i = 0; i < N; i++) {
			for (int j = i+1; j < N; j++) {
				cnt = 2;
				a = X[j] - X[i];
				b = Y[j] - Y[i];
				for (int j2 = 0; j2 < N; j2++) {
					if(j2 == i || j2 == j)	continue;
					if((a * (Y[j2] - Y[i])) == (b * (X[j2] - X[i]))) {
//						out.println("Y[" + j2 + "] = " + Y[j2]
//								+ "  a = " + a + "  X[" + j2 + "] = " + X[j2]
//								+ "  b = " + b + "  -->  " + (a * X[j2] + b));
						cnt++;
					}
				}
				ans = Math.max(ans, cnt);
//				out.println("cnt = " + cnt + "  ans = " + ans);
			}
		}
		out.println(ans);
	}

	// ------------------------------------------
	// ライブラリ
	// ------------------------------------------
	// Print
	private PrintWriter out = new PrintWriter(System.out);

	// Scanner
	private FastScanner scan = new FastScanner();

	int ni() {
		return scan.nextInt();
	}

	int[] ni(int n) {
		int[] a = new int[n];
		for (int i = 0; i < n; i++) {
			a[i] = ni();
		}
		return a;
	}

	int[][] ni(int y, int x) {
		int[][] a = new int[y][x];
		for (int i = 0; i < y; i++) {
			for (int j = 0; j < x; j++) {
				a[i][j] = ni();
			}
		}
		return a;
	}

	long nl() {
		return scan.nextLong();
	}

	long[] nl(int n) {
		long[] a = new long[n];
		for (int i = 0; i < n; i++) {
			a[i] = nl();
		}
		return a;
	}

	long[][] nl(int y, int x) {
		long[][] a = new long[y][x];
		for (int i = 0; i < y; i++) {
			for (int j = 0; j < x; j++) {
				a[i][j] = nl();
			}
		}
		return a;
	}

	String ns() {
		return scan.next();
	}

	String[] ns(int n) {
		String[] a = new String[n];
		for (int i = 0; i < n; i++) {
			a[i] = ns();
		}
		return a;
	}

	String[][] ns(int y, int x) {
		String[][] a = new String[y][x];
		for (int i = 0; i < y; i++) {
			for (int j = 0; j < x; j++) {
				a[i][j] = ns();
			}
		}
		return a;
	}
}

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 static 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());
	}
}
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