結果
| 問題 |
No.497 入れ子の箱
|
| コンテスト | |
| ユーザー |
btk
|
| 提出日時 | 2017-03-28 07:24:09 |
| 言語 | Java (openjdk 23) |
| 結果 |
AC
|
| 実行時間 | 153 ms / 5,000 ms |
| コード長 | 4,756 bytes |
| コンパイル時間 | 2,062 ms |
| コンパイル使用メモリ | 80,268 KB |
| 実行使用メモリ | 41,040 KB |
| 最終ジャッジ日時 | 2024-07-06 12:58:30 |
| 合計ジャッジ時間 | 6,120 ms |
|
ジャッジサーバーID (参考情報) |
judge5 / judge2 |
(要ログイン)
| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 29 |
ソースコード
import java.io.*;
import java.math.BigInteger;
import java.util.*;
/**
* Created by btk on 2017/03/16.
*/
public class Main {
static FastScanner in;
static PrintWriter out;
static void solve() {
int N=in.nextInt();
long[] x=new long[N];
long[] y=new long[N];
long[] z=new long[N];
ArrayList<Pair> ar=new ArrayList<Pair>();
for (int i = 0; i < N; i++) {
x[i] = in.nextLong();
y[i] = in.nextLong();
z[i] = in.nextLong();
BigInteger d = BigInteger.ONE;
d=d.multiply(BigInteger.valueOf(x[i]));
d=d.multiply(BigInteger.valueOf(y[i]));
d=d.multiply(BigInteger.valueOf(z[i]));
ar.add(new Pair(d,i));
}
Collections.sort(ar);
int[] dp = new int[N];
int res = 1;
for (int i = 0; i < N; i++) {
dp[i] = 1;
int now=ar.get(i).b;
for (int j = 0; j < i; j++) {
int prv=ar.get(j).b;
if(x[prv]<x[now]&&y[prv]<y[now]&&z[prv]<z[now])
dp[i] = Math.max(dp[i],dp[j]+1);
if(x[prv]<x[now]&&z[prv]<y[now]&&y[prv]<z[now])
dp[i] = Math.max(dp[i],dp[j]+1);
if(y[prv]<x[now]&&x[prv]<y[now]&&z[prv]<z[now])
dp[i] = Math.max(dp[i],dp[j]+1);
if(y[prv]<x[now]&&z[prv]<y[now]&&x[prv]<z[now])
dp[i] = Math.max(dp[i],dp[j]+1);
if(z[prv]<x[now]&&x[prv]<y[now]&&y[prv]<z[now])
dp[i] = Math.max(dp[i],dp[j]+1);
if(z[prv]<x[now]&&y[prv]<y[now]&&x[prv]<z[now])
dp[i] = Math.max(dp[i],dp[j]+1);
}
// out.println(ar.get(i).a.toString()+" "+x[now]+ " "+y[now]+" "+z[now]);
res = Math.max(res,dp[i]);
}
out.println(res);
}
public static void main(String[] args){
in = new FastScanner();
out = new PrintWriter(System.out);
solve();
out.flush();
out.close();
}
}
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());}
}
class Pair implements Comparable<Pair> {
BigInteger a;
int b;
public Pair(BigInteger a, int b) {
this.a = a;
this.b = b;
}
//(a,b)が一致
@Override
public boolean equals(Object o) {
if (o instanceof Pair) {
Pair p = (Pair) o;
return a == p.a && b == p.b;
}
return super.equals(o);
}
//辞書順比較
@Override
public int compareTo(Pair o) {
if (!a.equals(o.a)) {
return a.compareTo(o.a);
}
return Integer.compare(b,o.b);
}
}
btk