結果

問題 No.172 UFOを捕まえろ
ユーザー t8m8⛄️
提出日時 2015-03-26 23:33:26
言語 Java
(openjdk 23)
結果
WA  
(最新)
AC  
(最初)
実行時間 -
コード長 5,582 bytes
コンパイル時間 4,178 ms
コンパイル使用メモリ 81,720 KB
実行使用メモリ 37,260 KB
最終ジャッジ日時 2024-06-29 01:06:44
合計ジャッジ時間 6,275 ms
ジャッジサーバーID
(参考情報)
judge2 / judge3
このコードへのチャレンジ
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ファイルパターン 結果
sample AC * 3
other AC * 9 WA * 12
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 #
プレゼンテーションモードにする

import java.util.*;
import java.io.*;
import java.awt.geom.*;
import static java.util.Arrays.*;
import static java.lang.Math.*;
public class No172 {
static final InputStream in = System.in;
static final PrintWriter out = new PrintWriter(System.out,false);
static void solve(){
Point p = new Point(abs(nextInt()),abs(nextInt()));
int r = nextInt();
int i;
for (i=(int)p.x+1;; i++) {
if (ptSegDist(new Line(new Point(i,0),new Point(0,i)),p) >= r) {
break;
}
}
out.println(i);
}
static final double EPS = 1E-9;
static boolean epsEquals(double a, double b) { return abs(a-b) < EPS; };
static double dot(Point a, Point b) { return a.x*b.x + a.y*b.y; }
static double cross(Point a, Point b) { return a.x*b.y - a.y*b.x; }
static double ptSegDist(Line s, Point p) {
if (dot(s.p2.sub(s.p1),p.sub(s.p1)) < 0) return distance(p,s.p1);
if (dot(s.p1.sub(s.p2),p.sub(s.p2)) < 0) return distance(p,s.p2);
return ptLineDist(s,p);
}
static double ptLineDist(Line l, Point p) {
return abs(cross(p.sub(l.p1),l.p2.sub(l.p1)))/l.p2.sub(l.p1).length();
}
static double distance(Point a, Point b) {
return a.sub(b).length();
}
static class Point extends Point2D.Double implements Comparable {
double x, y;
public Point(double x, double y) {
this.x = x; this.y = y;
}
Point sum(Point a) { return new Point(x + a.x,y + a.y); }
Point sub(Point a) { return new Point(x - a.x,y - a.y); }
Point mul(double a) { return new Point(x * a,y * a); }
Point div(double a) { return new Point(x / a,y / a); }
double norm() { return this.distanceSq(x,y); }
double length() { return this.distance(x,y); }
@Override
public int compareTo(Object other) {
Point p = (Point)other;
if (!epsEquals(this.x,p.x)) return this.x < p.x ? -1 : 1;
if (!epsEquals(this.y,p.y)) return this.y < p.y ? -1 : 1;
return 0;
}
}
static class Line extends Line2D.Double {
Point p1, p2;
double x1,y1,x2,y2;
public Line(Point p1, Point p2) {
if (p1.compareTo(p2) < 0) {
this.x1 = p1.x; this.y1 = p1.y; this.x2 = p2.x; this.y2 = p2.y;
this.p1 = p1; this.p2 = p2;
}else {
this.x1 = p2.x; this.y1 = p2.y; this.x2 = p1.x; this.y2 = p1.y;
this.p1 = p2; this.p2 = p1;
}
}
}
public static void main(String[] args) throws Exception {
long start = System.currentTimeMillis();
solve();
out.flush();
long end = System.currentTimeMillis();
//trace(end-start + "ms");
in.close();
}
static void trace(Object... o) { System.out.println(deepToString(o));}
static final byte[] buf = new byte[1024];
static int ptr = 0;
static int buflen = 0;
static boolean hasNextByte() {
if (ptr < buflen)
return true;
ptr = 0;
try{
buflen = in.read(buf);
}catch (IOException e) {e.printStackTrace();}
if (buflen <= 0)
return false;
return true;
}
static int readByte() { if (hasNextByte()) return buf[ptr++]; else return -1;}
static boolean isPrintableChar(int c) { return 33 <= c && c <= 126;}
static void skip() { while(hasNextByte() && !isPrintableChar(buf[ptr])) ptr++;}
static boolean hasNext() {skip(); return hasNextByte();}
static 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();
}
static long nextLong() {
if (!hasNext()) throw new NoSuchElementException();
boolean minus = false;
long num = readByte();
if(num == '-'){
num = 0;
minus = true;
}else if (num < '0' || '9' < num){
throw new NumberFormatException();
}else{
num -= '0';
}
while(true){
int b = readByte();
if('0' <= b && b <= '9')
num = num * 10 + (b - '0');
else if(b == -1 || !isPrintableChar(b))
return minus ? -num : num;
else
throw new NoSuchElementException();
}
}
static int nextInt() {
long num = nextLong();
if (num < Integer.MIN_VALUE || Integer.MAX_VALUE < num)
throw new NumberFormatException();
return (int)num;
}
static double nextDouble() {
return Double.parseDouble(next());
}
static char nextChar() {
if (!hasNext()) throw new NoSuchElementException();
return (char)readByte();
}
static String nextLine() {
while (hasNextByte() && (buf[ptr] == '\n' || buf[ptr] == '\r')) ptr++;
if (!hasNextByte()) throw new NoSuchElementException();
StringBuilder sb = new StringBuilder();
int b = readByte();
while (b != '\n' && b != '\r') {
sb.appendCodePoint(b);
b = readByte();
}
return sb.toString();
}
static int[] nextArrayInt(int n) {
int[] a = new int[n];
for (int i=0; i<n; i++) a[i] = nextInt();
return a;
}
}
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