結果
| 問題 |
No.1827 最長部分スーパーリッチ門松列列
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2022-01-20 21:43:10 |
| 言語 | Java (openjdk 23) |
| 結果 |
AC
|
| 実行時間 | 210 ms / 2,000 ms |
| コード長 | 4,139 bytes |
| コンパイル時間 | 3,101 ms |
| コンパイル使用メモリ | 81,916 KB |
| 実行使用メモリ | 44,524 KB |
| 最終ジャッジ日時 | 2024-11-24 06:40:40 |
| 合計ジャッジ時間 | 9,400 ms |
|
ジャッジサーバーID (参考情報) |
judge2 / judge4 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 1 |
| other | AC * 24 |
ソースコード
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.NoSuchElementException;
class Main {
public static void main(String[] args) {
new Main().run();
}
void run() {
FastScanner sc=new FastScanner();
int T=sc.nextInt();
PrintWriter pw=new PrintWriter(System.out);
while (T-->0) {
int N=sc.nextInt();
int[] P=new int[N];
for (int i=0;i<N;++i) {
P[i]=sc.nextInt()-1;
}
pw.println(solve(N, P));
}
pw.close();
}
long solve(int N, int[] P) {
int[] sum=new int[N+1];
for (int i=0;i+1<N;++i) {
int lower=Math.min(P[i], P[i+1]);
int upper=Math.max(P[i], P[i+1]);
sum[lower]+=1;
sum[upper]-=1;
}
for (int i=0;i+1<N;++i) {
sum[i+1]+=sum[i];
}
int ans=1+Arrays.stream(sum).max().getAsInt();
return ans;
}
static void tr(Object...objects) {
System.out.println(Arrays.deepToString(objects));
}
}
class BruteForce {
class DSU {
int[] parent;
public DSU(int n) {
parent=new int[n];
Arrays.fill(parent, -1);
}
int root(int x) {
return parent[x] < 0 ? x : (parent[x] = root(parent[x]));
}
void union(int x, int y) {
x=root(x);
y=root(y);
if (x==y) return;
parent[y]+=parent[x];
parent[x]=y;
}
boolean equiv(int x, int y) {
return root(x) == root(y);
}
}
int gcd(int a, int b) {
if (a == 0) return b;
return gcd(b%a, a);
}
boolean iscoprime(int a, int b) {
return gcd(a, b) == 1;
}
int grundy(ArrayList<Integer> set, int mod) {
DSU dsu=new DSU(mod);
for (int i=1;i<mod;++i) {
if (!iscoprime(i, mod)) continue;
for (int a : set) {
dsu.union(i*a%mod, i);
}
}
boolean equiv = true;
for (int i=1;i<mod;++i) if (iscoprime(i, mod)) equiv &= dsu.equiv(1, i);
if (equiv) return 0;
boolean[] vis=new boolean[mod];
for (int i=1;i<mod;++i) if (iscoprime(i, mod)) {
loop:for (int j=1;j<mod;++j) if (iscoprime(j, mod)) {
if (!dsu.equiv(i, i*j%mod)){
set.add(j);
vis[grundy(set, mod)]=true;
set.remove(set.size()-1);
continue loop;
}
}
}
int ret=0;
while (vis[ret]) ++ret;
return ret;
}
}
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();
}
}