結果
| 問題 |
No.1285 ゴミ捨て
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2020-11-13 23:22:59 |
| 言語 | Java (openjdk 23) |
| 結果 |
AC
|
| 実行時間 | 260 ms / 2,000 ms |
| コード長 | 4,751 bytes |
| コンパイル時間 | 3,981 ms |
| コンパイル使用メモリ | 82,676 KB |
| 実行使用メモリ | 62,672 KB |
| 最終ジャッジ日時 | 2024-11-28 21:49:52 |
| 合計ジャッジ時間 | 7,078 ms |
|
ジャッジサーバーID (参考情報) |
judge4 / judge5 |
(要ログイン)
| ファイルパターン | 結果 |
|---|---|
| sample | AC * 2 |
| other | AC * 22 |
ソースコード
import java.io.IOException;
import java.io.InputStream;
import java.util.Arrays;
import java.util.HashMap;
import java.util.NoSuchElementException;
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();
}
}
int nextInt() {
return (int)nextLong();
}
}
class PersistentStack {
PersistentStack next=null;
int val;
public PersistentStack(int val, PersistentStack next) {
this.val=val;
this.next=next;
}
public PersistentStack() {
}
int peek() {
return val;
}
PersistentStack pop() {
if (next!=null) next=next.eval();
return next;
}
static PersistentStack push(PersistentStack x, int v) {
return new PersistentStack(v, x);
}
static PersistentStack concat(PersistentStack x, PersistentStack y) {
if (x==null) return y.eval();
else return new PersistentStack(x.val, new PersistentStack() {
@Override
PersistentStack eval() {
return PersistentStack.concat(x.pop(), y);
}
});
}
static PersistentStack reverse(PersistentStack head) {
return new PersistentStack () {
@Override
PersistentStack eval() {
PersistentStack ret=null;
for (PersistentStack x=head;x!=null;x=x.pop()) {
ret=PersistentStack.push(ret, x.peek());
}
return ret;
}
};
}
PersistentStack eval() {
return this;
}
}
class PersistentQueue {
int front_size=0;
int back_size=0;
PersistentStack front=null;
PersistentStack back=null;
public PersistentQueue(PersistentStack front, int front_size, PersistentStack back, int back_size) {
this.front_size=front_size;
this.back_size=back_size;
this.front=front;
this.back=back;
}
public PersistentQueue() {
}
boolean isEmpty() {
return front_size==0;
}
int peek() {
return front.peek();
}
PersistentQueue push(int x) {
return new PersistentQueue(front, front_size, PersistentStack.push(back, x), back_size+1).normalize();
}
PersistentQueue pop() {
return new PersistentQueue(front.pop(), front_size-1, back, back_size).normalize();
}
PersistentQueue normalize() {
if (front_size >= back_size) return this;
else {
return new PersistentQueue(PersistentStack.concat(front, PersistentStack.reverse(back)), front_size+back_size, null, 0);
}
}
}
public class Main {
long pow(long a,long n,long p) {
return n!=0?pow(a*a%p,n/2,p)*(n%2==1?a:1)%p:1;
}
public void run() {
FastScanner sc=new FastScanner();
int N=sc.nextInt();
int[] A=new int[N];
for (int i=0;i<N;++i) {
A[i]=sc.nextInt();
}
Arrays.sort(A);
HashMap<Integer,Integer> map=new HashMap<>();
for (int i=0;i<N;++i) {
map.merge(A[i], 1, Integer::sum);
}
int ans=0;
for (int i=0;i<N;++i) {
ans=Math.max(ans, map.get(A[i])+map.getOrDefault(A[i]+1, 0));
}
System.out.println(ans);
}
static void tr(Object...objects) {System.out.println(Arrays.deepToString(objects));}
public static void main(String[] args) {
new Main().run();
}
}