結果

問題 No.321 (P,Q)-サンタと街の子供たち
ユーザー ぴろずぴろず
提出日時 2015-12-17 22:22:19
言語 Java21
(openjdk 21)
結果
WA  
実行時間 -
コード長 4,375 bytes
コンパイル時間 2,414 ms
コンパイル使用メモリ 74,480 KB
実行使用メモリ 54,852 KB
最終ジャッジ日時 2023-10-14 12:52:26
合計ジャッジ時間 8,284 ms
ジャッジサーバーID
(参考情報)
judge15 / judge14
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 43 ms
49,276 KB
testcase_01 AC 43 ms
49,176 KB
testcase_02 AC 43 ms
49,300 KB
testcase_03 AC 44 ms
49,276 KB
testcase_04 AC 44 ms
49,064 KB
testcase_05 AC 43 ms
49,332 KB
testcase_06 WA -
testcase_07 WA -
testcase_08 AC 43 ms
49,236 KB
testcase_09 WA -
testcase_10 WA -
testcase_11 AC 42 ms
49,244 KB
testcase_12 WA -
testcase_13 AC 43 ms
49,340 KB
testcase_14 WA -
testcase_15 AC 116 ms
52,604 KB
testcase_16 WA -
testcase_17 AC 45 ms
49,336 KB
testcase_18 WA -
testcase_19 WA -
testcase_20 WA -
testcase_21 AC 98 ms
52,340 KB
testcase_22 WA -
testcase_23 AC 123 ms
52,420 KB
testcase_24 WA -
testcase_25 WA -
testcase_26 WA -
testcase_27 WA -
testcase_28 WA -
testcase_29 AC 115 ms
52,528 KB
testcase_30 AC 51 ms
49,412 KB
testcase_31 WA -
testcase_32 AC 112 ms
52,808 KB
testcase_33 WA -
testcase_34 WA -
testcase_35 AC 125 ms
52,524 KB
testcase_36 WA -
testcase_37 WA -
testcase_38 WA -
testcase_39 AC 86 ms
52,600 KB
testcase_40 WA -
testcase_41 AC 105 ms
53,084 KB
testcase_42 WA -
testcase_43 WA -
testcase_44 WA -
権限があれば一括ダウンロードができます

ソースコード

diff #

package no321;

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

public class Main {

	public static void main(String[] args) {
		IO io = new IO();
		int p = io.nextInt();
		int q = io.nextInt();
		int n = io.nextInt();
		int ans = 0;
		for(int i=0;i<n;i++) {
			int x = io.nextInt();
			int y = io.nextInt();
			if (hasSolution(p,q,x,y)) {
				ans++;
			}
		}
		System.out.println(ans);
	}
	
	//解説を読んだ
	public static boolean hasSolution(int p,int q,int x,int y) {
		if (p == 0 && q == 0) {
			return x == 0 && y == 0;
		}
		long gcd = gcd(p,q);
		long mod = (((p / gcd) ^ (q / gcd)) & 1) == 1 ? gcd : 2 * gcd;
		return (x + y) % mod == 0;
	}
	
	public static long gcd(long a,long b) {
		while(b!=0) {
			long r = a%b;
			a = b;
			b = r;
		}
		return a;
	}

}

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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