結果

問題 No.1205 Eye Drops
ユーザー mikit
提出日時 2020-08-30 13:13:41
言語 Java
(openjdk 23)
結果
RE  
(最新)
AC  
(最初)
実行時間 -
コード長 9,068 bytes
コンパイル時間 3,402 ms
コンパイル使用メモリ 84,820 KB
実行使用メモリ 46,520 KB
最終ジャッジ日時 2024-11-23 20:42:04
合計ジャッジ時間 6,443 ms
ジャッジサーバーID
(参考情報)
judge1 / judge2
このコードへのチャレンジ
(要ログイン)
ファイルパターン 結果
sample RE * 2
other RE * 37
権限があれば一括ダウンロードができます

ソースコード

diff #
プレゼンテーションモードにする

import java.io.OutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.nio.CharBuffer;
import java.io.IOException;
import java.nio.charset.CharsetDecoder;
import java.lang.reflect.Field;
import java.nio.charset.StandardCharsets;
import java.nio.ByteBuffer;
import java.io.UncheckedIOException;
import java.nio.charset.Charset;
import java.io.Writer;
import java.util.NoSuchElementException;
import java.io.InputStream;
/**
* Built using CHelper reloaded plug-in
* Actual solution is at the top
*
* @author mikit
*/
public class Main {
public static void main(String[] args) {
InputStream inputStream = System.in;
OutputStream outputStream = System.out;
LightScanner2 in = new LightScanner2(inputStream);
LightWriter2 out = new LightWriter2(outputStream);
No1205EyeDrops solver = new No1205EyeDrops();
solver.solve(1, in, out);
out.close();
}
static class No1205EyeDrops {
public void solve(int testNumber, LightScanner2 in, LightWriter2 out) {
int n = in.ints(), m = in.ints();
long now = 0, pos = 0;
for (int i = 0; i < m; i++) {
long t = in.longs(), x = in.longs();
if (Math.abs(x - pos) > t - now) {
out.noln();
return;
}
now = t;
pos = x;
}
out.yesln();
}
}
static class LightScanner2 extends LightScannerAdapter {
private static final int BUF_SIZE = 32 * 1024;
private final InputStream stream;
private final byte[] buf = new byte[BUF_SIZE];
private int ptr;
private int len;
public LightScanner2(InputStream stream) {
this.stream = stream;
}
private int read() {
if (ptr < len) return buf[ptr++];
try {
ptr = 0;
len = stream.read(buf);
} catch (IOException ex) {
throw new UncheckedIOException(ex);
}
if (len == -1) return -1;
return buf[ptr++];
}
private void skip() {
int b;
while (isTokenSeparator(b = read()) && b != -1) ;
if (b == -1) throw new NoSuchElementException("EOF");
ptr--;
}
public int ints() {
return (int) longs();
}
public long longs() {
skip();
int b = read();
boolean negate;
if (b == '-') {
negate = true;
b = read();
} else negate = false;
long x = 0;
for (; !isTokenSeparator(b); b = read()) {
if ('0' <= b && b <= '9') x = x * 10 + b - '0';
else throw new NumberFormatException("Unexpected character '" + b + "'");
}
return negate ? -x : x;
}
public void close() {
try {
stream.close();
} catch (IOException e) {
throw new UncheckedIOException(e);
}
}
private static boolean isTokenSeparator(int b) {
return b < 33 || 126 < b;
}
}
static class LightWriter2 implements AutoCloseable {
private static final int BUF_SIZE = 32 * 1024;
private static final int BUF_THRESHOLD = 1024;
private final OutputStream out;
private final byte[] buf = new byte[BUF_SIZE];
private int ptr;
private final Field fastStringAccess;
private boolean autoflush = false;
private boolean breaked = true;
private LightWriter2.BoolLabel boolLabel = LightWriter2.BoolLabel.YES_NO_FIRST_UP;
public LightWriter2(OutputStream out) {
this.out = out;
Field f;
try {
f = String.class.getDeclaredField("value");
f.setAccessible(true);
if (f.getType() != byte[].class) f = null;
} catch (ReflectiveOperationException ignored) {
f = null;
}
this.fastStringAccess = f;
}
public LightWriter2(Writer out) {
this.out = new LightWriter2.WriterOutputStream(out);
this.fastStringAccess = null;
}
private void allocate(int n) {
if (ptr + n <= BUF_SIZE) return;
try {
out.write(buf, 0, ptr);
ptr = 0;
} catch (IOException ex) {
throw new UncheckedIOException(ex);
}
if (BUF_SIZE < n) throw new IllegalArgumentException("Internal buffer exceeded");
}
public void close() {
try {
out.write(buf, 0, ptr);
ptr = 0;
out.flush();
out.close();
} catch (IOException ex) {
throw new UncheckedIOException(ex);
}
}
public LightWriter2 print(char c) {
allocate(1);
buf[ptr++] = (byte) c;
breaked = false;
return this;
}
public LightWriter2 print(String s) {
byte[] bytes;
if (this.fastStringAccess == null) bytes = s.getBytes();
else {
try {
bytes = (byte[]) fastStringAccess.get(s);
} catch (IllegalAccessException ignored) {
bytes = s.getBytes();
}
}
int n = bytes.length;
if (n <= BUF_THRESHOLD) {
allocate(n);
System.arraycopy(bytes, 0, buf, ptr, n);
ptr += n;
return this;
}
try {
out.write(buf, 0, ptr);
ptr = 0;
out.write(bytes);
out.flush();
} catch (IOException ex) {
throw new UncheckedIOException(ex);
}
return this;
}
public LightWriter2 ans(String s) {
if (!breaked) {
print(' ');
}
return print(s);
}
public LightWriter2 ans(boolean b) {
return ans(boolLabel.transfer(b));
}
public LightWriter2 yesln() {
return ans(true).ln();
}
public LightWriter2 noln() {
return ans(false).ln();
}
public LightWriter2 ln() {
print(System.lineSeparator());
breaked = true;
if (autoflush) {
try {
out.flush();
} catch (IOException ex) {
throw new UncheckedIOException(ex);
}
}
return this;
}
public enum BoolLabel {
YES_NO_FIRST_UP("Yes", "No"),
YES_NO_ALL_UP("YES", "NO"),
YES_NO_ALL_DOWN("yes", "no"),
Y_N_ALL_UP("Y", "N"),
POSSIBLE_IMPOSSIBLE_FIRST_UP("Possible", "Impossible"),
POSSIBLE_IMPOSSIBLE_ALL_UP("POSSIBLE", "IMPOSSIBLE"),
POSSIBLE_IMPOSSIBLE_ALL_DOWN("possible", "impossible"),
FIRST_SECOND_FIRST_UP("First", "Second"),
FIRST_SECOND_ALL_UP("FIRST", "SECOND"),
FIRST_SECOND_ALL_DOWN("first", "second"),
ALICE_BOB_FIRST_UP("Alice", "Bob"),
ALICE_BOB_ALL_UP("ALICE", "BOB"),
ALICE_BOB_ALL_DOWN("alice", "bob"),
;
private final String positive;
private final String negative;
BoolLabel(String positive, String negative) {
this.positive = positive;
this.negative = negative;
}
private String transfer(boolean f) {
return f ? positive : negative;
}
}
private static class WriterOutputStream extends OutputStream {
final Writer writer;
final CharsetDecoder decoder;
WriterOutputStream(Writer writer) {
this.writer = writer;
this.decoder = StandardCharsets.UTF_8.newDecoder();
}
public void write(int b) throws IOException {
writer.write(b);
}
public void write(byte[] b) throws IOException {
writer.write(decoder.decode(ByteBuffer.wrap(b)).array());
}
public void write(byte[] b, int off, int len) throws IOException {
writer.write(decoder.decode(ByteBuffer.wrap(b, off, len)).array());
}
public void flush() throws IOException {
writer.flush();
}
public void close() throws IOException {
writer.close();
}
}
}
static abstract class LightScannerAdapter implements AutoCloseable {
public abstract void close();
}
}
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