#2114 (Java) No.61 リベリオン

• 問題: No.61 リベリオン
• ユーザー: uwi
• 提出日時: 2014-11-10 04:38:50
• 言語: Java (openjdk 23)
• 結果: AC
• 実行時間: 147 ms / 5,000 ms
• コード長: 5,205 bytes
• コンパイル時間: 2,168 ms
• コンパイル使用メモリ: 80,972 KB
• 実行使用メモリ: 40,392 KB
• 最終ジャッジ日時: 2024-10-13 16:13:45
• 合計ジャッジ時間: 3,211 ms
• ジャッジサーバーID （参考情報）: judge4 / judge3

ファイルパターン	結果
sample	AC * 2
other	AC * 4

ソースコード

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.Arrays;
import java.util.InputMismatchException;

public class Main {
	static InputStream is;
	static PrintWriter out;
	static String INPUT = "";
	
	static void solve()
	{
		for(int T = ni();T >= 1;T--){
			int w = ni(), h = ni();
			int d = ni();
			int mx = ni(), my = ni();
			int hx = ni(), hy = ni();
			int vx = ni(), vy = ni();
			if(vx < 0){
				mx = w-mx;
				hx = w-hx;
				vx = -vx;
			}
			if(vy < 0){
				my = h-my;
				hy = h-hy;
				vy = -vy;
			}
			
			if(
			check(2*w, 2*h, mx, my, hx, hy, vx, vy, d) ||
			check(2*w, 2*h, 2*w-mx, my, hx, hy, vx, vy, d) ||
			check(2*w, 2*h, mx, 2*h-my, hx, hy, vx, vy, d) ||
			check(2*w, 2*h, 2*w-mx, 2*h-my, hx, hy, vx, vy, d)
			){
				out.println("Hit");
			}else{
				out.println("Miss");
			}
			
		}
	}
	
	static boolean check(long w2, long h2, long mx, long my, long hx, long hy, long vx, long vy, long d)
	{
		if(vx == 0){
			long ty = my;
			if(ty < hy)ty += h2;
			return hx == mx && ty-hy <= d*vy;
		}
		if(vy == 0){
			long tx = mx;
			if(tx < hx)tx += w2;
			return hy == my && tx-hx <= d*vx;
		}
//		tr(hx, hy, mx, my, vx, vy, w2, h2);
		
		long[] eg = exGCD(w2*vy, -h2*vx);
		long c = (hx-mx)*vy-(hy-my)*vx;
		if(c % eg[0] != 0)return false;
//		tr(eg, w2*vy, h2*vx, c);
		
		long a = eg[1]*(c/eg[0]);
		long val = a*w2-(hx-mx);
		long unit = h2*vx/eg[0]*w2;
		val %= unit;
		if(val < 0)val += unit;
		return val <= d*vx;
	}
	
	public static long[] exGCD(long a, long b)
	{
		if(a == 0 || b == 0)return null;
		int as = Long.signum(a);
		int bs = Long.signum(b);
		a = Math.abs(a); b = Math.abs(b);
		long p = 1, q = 0, r = 0, s = 1;
		while(b > 0){
			long c = a / b;
			long d;
			d = a; a = b; b = d % b;
			d = p; p = q; q = d - c * q;
			d = r; r = s; s = d - c * s;
		}
		return new long[]{a, p * as, r * bs};
	}
	
	public static int gcd(int a, int b) {
		while (b > 0) {
			int c = a;
			a = b;
			b = c % b;
		}
		return a;
	}
	
	
	public static void main(String[] args) throws Exception
	{
		long S = System.currentTimeMillis();
		is = INPUT.isEmpty() ? System.in : new ByteArrayInputStream(INPUT.getBytes());
		out = new PrintWriter(System.out);
		
		solve();
		out.flush();
		long G = System.currentTimeMillis();
		tr(G-S+"ms");
	}
	
	private static boolean eof()
	{
		if(lenbuf == -1)return true;
		int lptr = ptrbuf;
		while(lptr < lenbuf)if(!isSpaceChar(inbuf[lptr++]))return false;
		
		try {
			is.mark(1000);
			while(true){
				int b = is.read();
				if(b == -1){
					is.reset();
					return true;
				}else if(!isSpaceChar(b)){
					is.reset();
					return false;
				}
			}
		} catch (IOException e) {
			return true;
		}
	}
	
	private static byte[] inbuf = new byte[1024];
	static int lenbuf = 0, ptrbuf = 0;
	
	private static int readByte()
	{
		if(lenbuf == -1)throw new InputMismatchException();
		if(ptrbuf >= lenbuf){
			ptrbuf = 0;
			try { lenbuf = is.read(inbuf); } catch (IOException e) { throw new InputMismatchException(); }
			if(lenbuf <= 0)return -1;
		}
		return inbuf[ptrbuf++];
	}
	
	private static boolean isSpaceChar(int c) { return !(c >= 33 && c <= 126); }
	private static int skip() { int b; while((b = readByte()) != -1 && isSpaceChar(b)); return b; }
	
	private static double nd() { return Double.parseDouble(ns()); }
	private static char nc() { return (char)skip(); }
	
	private static String ns()
	{
		int b = skip();
		StringBuilder sb = new StringBuilder();
		while(!(isSpaceChar(b))){ // when nextLine, (isSpaceChar(b) && b != ' ')
			sb.appendCodePoint(b);
			b = readByte();
		}
		return sb.toString();
	}
	
	private static char[] ns(int n)
	{
		char[] buf = new char[n];
		int b = skip(), p = 0;
		while(p < n && !(isSpaceChar(b))){
			buf[p++] = (char)b;
			b = readByte();
		}
		return n == p ? buf : Arrays.copyOf(buf, p);
	}
	
	private static char[][] nm(int n, int m)
	{
		char[][] map = new char[n][];
		for(int i = 0;i < n;i++)map[i] = ns(m);
		return map;
	}
	
	private static int[] na(int n)
	{
		int[] a = new int[n];
		for(int i = 0;i < n;i++)a[i] = ni();
		return a;
	}
	
	private static int ni()
	{
		int num = 0, b;
		boolean minus = false;
		while((b = readByte()) != -1 && !((b >= '0' && b <= '9') || b == '-'));
		if(b == '-'){
			minus = true;
			b = readByte();
		}
		
		while(true){
			if(b >= '0' && b <= '9'){
				num = num * 10 + (b - '0');
			}else{
				return minus ? -num : num;
			}
			b = readByte();
		}
	}
	
	private static long nl()
	{
		long num = 0;
		int b;
		boolean minus = false;
		while((b = readByte()) != -1 && !((b >= '0' && b <= '9') || b == '-'));
		if(b == '-'){
			minus = true;
			b = readByte();
		}
		
		while(true){
			if(b >= '0' && b <= '9'){
				num = num * 10 + (b - '0');
			}else{
				return minus ? -num : num;
			}
			b = readByte();
		}
	}
	
	private static void tr(Object... o) { if(INPUT.length() != 0)System.out.println(Arrays.deepToString(o)); }
}