結果
問題 | No.622 点と三角柱の内外判定 |
ユーザー |
|
提出日時 | 2020-03-24 23:55:19 |
言語 | Java (openjdk 23) |
結果 |
WA
|
実行時間 | - |
コード長 | 4,208 bytes |
コンパイル時間 | 2,287 ms |
コンパイル使用メモリ | 80,688 KB |
実行使用メモリ | 53,024 KB |
最終ジャッジ日時 | 2025-01-01 18:59:27 |
合計ジャッジ時間 | 5,219 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge5 |
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ファイルパターン | 結果 |
---|---|
other | AC * 19 WA * 13 |
ソースコード
import java.io.FileNotFoundException;import java.io.IOException;import java.io.InputStream;import java.util.Arrays;import java.util.NoSuchElementException;public class Main {public static void main(String[] args) throws FileNotFoundException {long t = System.currentTimeMillis();new Main().run();System.err.println(System.currentTimeMillis() - t);}double[][] mul(double[][] a,double[][] b){double[][] ret=new double[a.length][b[0].length];for(int i=0;i<a.length;++i) {for(int j=0;j<b[i].length;++j) {for(int k=0;k<a[i].length;++k) {ret[i][j]+=a[i][k]*b[k][j];}}}return ret;}//return det(M_{ij})double detM(double[][] A,int i,int j) {int n=A.length;int p=0;double[][] ret=new double[n][n];for(int h=0;h<n;++h) {if(h==i)continue;int q=0;for(int w=0;w<n;++w) {if(w==j)continue;ret[p][q++]+=A[h][w];}++p;}return ret[0][0]*ret[1][1]-ret[0][1]*ret[1][0];}double[][] inv(double[][] A){int n=A.length;double[][] ret=new double[n][n];for(int i=0;i<n;++i) {for(int j=0;j<n;++j) {ret[i][j]+=((i+j)%2==0?1:(-1))*detM(A,j,i);}}double det=0;for(int shift=0;shift<3;++shift) {double plus=1,minus=1;for(int i=0;i<3;++i)plus*=A[(i+shift)%n][i];for(int i=0;i<3;++i)minus*=A[(i+shift)%n][(n-i)%n];det+=plus-minus;}for(int i=0;i<n;++i)for(int j=0;j<n;++j)ret[i][j]/=det;return ret;}double[] vector_product(double[] a,double[] b){return new double[] {a[1]*b[2]-a[2]*b[1],a[2]*b[0]-a[0]*b[2],a[0]*b[1]-a[1]*b[0]};}void run() {FastScanner sc = new FastScanner();double[][] e=new double[3][3];for(int i=0;i<3;++i) {for(int j=0;j<3;++j) {e[i][j]=sc.nextLong();}}double[] v=new double[3];for(int i=0;i<v.length;++i)v[i]=sc.nextInt();for(int i=0;i<3;++i)v[i]-=e[2][i];for(int i=0;i<3;++i) {for(int j=0;j<3;++j) {e[i][j]-=e[2][j];}}e[2]=vector_product(e[0], e[1]);double[][] ret=mul(new double[][] {{v[0]},{v[1]},{v[2]}},inv(e));System.out.println(0<=ret[0][0]&&0<=ret[0][1]&&ret[0][0]+ret[0][1]<=1?"YES":"NO");}static void tr(Object... objects) {System.out.println(Arrays.deepToString(objects));}}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;}private void skipUnprintable() { while(hasNextByte() && !isPrintableChar(buffer[ptr])) ptr++;}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();}}