結果
| 問題 |
No.406 鴨等間隔の法則
|
| ユーザー |
|
| 提出日時 | 2018-03-21 20:12:21 |
| 言語 | Java (openjdk 23) |
| 結果 |
AC
|
| 実行時間 | 148 ms / 2,000 ms |
| コード長 | 3,219 bytes |
| コンパイル時間 | 1,937 ms |
| コンパイル使用メモリ | 78,544 KB |
| 実行使用メモリ | 40,404 KB |
| 最終ジャッジ日時 | 2024-07-07 12:22:23 |
| 合計ジャッジ時間 | 6,556 ms |
|
ジャッジサーバーID (参考情報) |
judge4 / judge1 |
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| 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.OutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.Arrays;
import java.io.IOException;
import java.util.NoSuchElementException;
import java.io.InputStream;
/**
* Built using CHelper plug-in
* Actual solution is at the top
*/
public class Main {
public static void main(String[] args) {
InputStream inputStream = System.in;
OutputStream outputStream = System.out;
FastScanner in = new FastScanner(inputStream);
PrintWriter out = new PrintWriter(outputStream);
Task solver = new Task();
solver.solve(1, in, out);
out.close();
}
static class Task {
public void solve(int testNumber, FastScanner in, PrintWriter out) {
final int n = in.nextInt();
int[] x = new int[n];
for (int i = 0; i < n; i++) x[i] = in.nextInt();
Arrays.sort(x);
int dx = x[1] - x[0];
if (dx == 0) {
out.println("NO");
return;
}
for (int i = 1; i < n; i++) {
if (x[i] - x[i - 1] != dx) {
out.println("NO");
return;
}
}
out.println("YES");
}
}
static class FastScanner {
private InputStream in;
private byte[] buffer;
private int p;
private int bufLen;
public FastScanner(InputStream in) {
this.in = in;
buffer = new byte[1024];
}
private boolean hasNextByte() {
if (p < bufLen) return true;
p = 0;
try {
bufLen = in.read(buffer);
} catch (IOException e) {
e.printStackTrace();
}
return (bufLen > 0);
}
private int readByte() {
if (hasNextByte()) return buffer[p++];
return -1;
}
private static boolean isPrintableChar(int c) {
return (c >= 33 && c <= 126);
}
public boolean hasNext() {
while (hasNextByte() && !isPrintableChar(buffer[p])) p++;
return hasNextByte();
}
public int nextInt() {
long nl = nextLong();
if (nl < Integer.MIN_VALUE || nl > Integer.MAX_VALUE) throw new NumberFormatException();
return (int) nl;
}
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' || b > '9') throw new NumberFormatException();
while (true) {
if (b >= '0' && b <= '9') {
n *= 10;
n += b - '0';
} else if (b == -1 || !isPrintableChar(b)) {
return minus ? -n : n;
} else {
throw new NumberFormatException();
}
b = readByte();
}
}
}
}