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May 6, 2018 10:30
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import java.io.Writer; | |
import java.io.BufferedWriter; | |
import java.io.OutputStreamWriter; | |
import java.io.OutputStream; | |
import java.io.PrintWriter; | |
import java.io.IOException; | |
import java.io.InputStream; | |
import java.math.BigInteger; | |
import java.util.Arrays; | |
import java.util.InputMismatchException; | |
class InputReader { | |
private boolean finished = false; | |
private InputStream stream; | |
private byte[] buf = new byte[1024]; | |
private int curChar; | |
private int numChars; | |
private SpaceCharFilter filter; | |
public InputReader(InputStream stream) { | |
this.stream = stream; | |
} | |
public int read() { | |
if (numChars == -1) { | |
throw new InputMismatchException(); | |
} | |
if (curChar >= numChars) { | |
curChar = 0; | |
try { | |
numChars = stream.read(buf); | |
} catch (IOException e) { | |
throw new InputMismatchException(); | |
} | |
if (numChars <= 0) { | |
return -1; | |
} | |
} | |
return buf[curChar++]; | |
} | |
public int peek() { | |
if (numChars == -1) { | |
return -1; | |
} | |
if (curChar >= numChars) { | |
curChar = 0; | |
try { | |
numChars = stream.read(buf); | |
} catch (IOException e) { | |
return -1; | |
} | |
if (numChars <= 0) { | |
return -1; | |
} | |
} | |
return buf[curChar]; | |
} | |
public int nextInt() { | |
int c = read(); | |
while (isSpaceChar(c)) { | |
c = read(); | |
} | |
int sgn = 1; | |
if (c == '-') { | |
sgn = -1; | |
c = read(); | |
} | |
int res = 0; | |
do { | |
if (c < '0' || c > '9') { | |
throw new InputMismatchException(); | |
} | |
res *= 10; | |
res += c - '0'; | |
c = read(); | |
} while (!isSpaceChar(c)); | |
return res * sgn; | |
} | |
public long nextLong() { | |
int c = read(); | |
while (isSpaceChar(c)) { | |
c = read(); | |
} | |
int sgn = 1; | |
if (c == '-') { | |
sgn = -1; | |
c = read(); | |
} | |
long res = 0; | |
do { | |
if (c < '0' || c > '9') { | |
throw new InputMismatchException(); | |
} | |
res *= 10; | |
res += c - '0'; | |
c = read(); | |
} while (!isSpaceChar(c)); | |
return res * sgn; | |
} | |
public String nextString() { | |
int c = read(); | |
while (isSpaceChar(c)) { | |
c = read(); | |
} | |
StringBuilder res = new StringBuilder(); | |
do { | |
if (Character.isValidCodePoint(c)) { | |
res.appendCodePoint(c); | |
} | |
c = read(); | |
} while (!isSpaceChar(c)); | |
return res.toString(); | |
} | |
public boolean isSpaceChar(int c) { | |
if (filter != null) { | |
return filter.isSpaceChar(c); | |
} | |
return isWhitespace(c); | |
} | |
public static boolean isWhitespace(int c) { | |
return c == ' ' || c == '\n' || c == '\r' || c == '\t' || c == -1; | |
} | |
private String readLine0() { | |
StringBuilder buf = new StringBuilder(); | |
int c = read(); | |
while (c != '\n' && c != -1) { | |
if (c != '\r') { | |
buf.appendCodePoint(c); | |
} | |
c = read(); | |
} | |
return buf.toString(); | |
} | |
public String readLine() { | |
String s = readLine0(); | |
while (s.trim().length() == 0) { | |
s = readLine0(); | |
} | |
return s; | |
} | |
public String readLine(boolean ignoreEmptyLines) { | |
if (ignoreEmptyLines) { | |
return readLine(); | |
} else { | |
return readLine0(); | |
} | |
} | |
public BigInteger readBigInteger() { | |
try { | |
return new BigInteger(nextString()); | |
} catch (NumberFormatException e) { | |
throw new InputMismatchException(); | |
} | |
} | |
public char nextCharacter() { | |
int c = read(); | |
while (isSpaceChar(c)) { | |
c = read(); | |
} | |
return (char) c; | |
} | |
public double nextDouble() { | |
int c = read(); | |
while (isSpaceChar(c)) { | |
c = read(); | |
} | |
int sgn = 1; | |
if (c == '-') { | |
sgn = -1; | |
c = read(); | |
} | |
double res = 0; | |
while (!isSpaceChar(c) && c != '.') { | |
if (c == 'e' || c == 'E') { | |
return res * Math.pow(10, nextInt()); | |
} | |
if (c < '0' || c > '9') { | |
throw new InputMismatchException(); | |
} | |
res *= 10; | |
res += c - '0'; | |
c = read(); | |
} | |
if (c == '.') { | |
c = read(); | |
double m = 1; | |
while (!isSpaceChar(c)) { | |
if (c == 'e' || c == 'E') { | |
return res * Math.pow(10, nextInt()); | |
} | |
if (c < '0' || c > '9') { | |
throw new InputMismatchException(); | |
} | |
m /= 10; | |
res += (c - '0') * m; | |
c = read(); | |
} | |
} | |
return res * sgn; | |
} | |
public boolean isExhausted() { | |
int value; | |
while (isSpaceChar(value = peek()) && value != -1) { | |
read(); | |
} | |
return value == -1; | |
} | |
public String next() { | |
return nextString(); | |
} | |
public SpaceCharFilter getFilter() { | |
return filter; | |
} | |
public void setFilter(SpaceCharFilter filter) { | |
this.filter = filter; | |
} | |
public interface SpaceCharFilter { | |
public boolean isSpaceChar(int ch); | |
} | |
public int[] nextIntArray(int n){ | |
int[] array=new int[n]; | |
for(int i=0;i<n;++i)array[i]=nextInt(); | |
return array; | |
} | |
public int[] nextSortedIntArray(int n){ | |
int array[]=nextIntArray(n); | |
Arrays.sort(array); | |
return array; | |
} | |
public int[] nextSumIntArray(int n){ | |
int[] array=new int[n]; | |
array[0]=nextInt(); | |
for(int i=1;i<n;++i)array[i]=array[i-1]+nextInt(); | |
return array; | |
} | |
public long[] nextLongArray(int n){ | |
long[] array=new long[n]; | |
for(int i=0;i<n;++i)array[i]=nextLong(); | |
return array; | |
} | |
public long[] nextSumLongArray(int n){ | |
long[] array=new long[n]; | |
array[0]=nextInt(); | |
for(int i=1;i<n;++i)array[i]=array[i-1]+nextInt(); | |
return array; | |
} | |
public long[] nextSortedLongArray(int n){ | |
long array[]=nextLongArray(n); | |
Arrays.sort(array); | |
return array; | |
} | |
} | |
class OutputWriter { | |
private final PrintWriter writer; | |
public OutputWriter(OutputStream outputStream) { | |
writer = new PrintWriter(new BufferedWriter(new OutputStreamWriter(outputStream))); | |
} | |
public OutputWriter(Writer writer) { | |
this.writer = new PrintWriter(writer); | |
} | |
public void print(char[] array) { | |
writer.print(array); | |
} | |
public void print(Object... objects) { | |
for (int i = 0; i < objects.length; i++) { | |
if (i != 0) { | |
writer.print(' '); | |
} | |
writer.print(objects[i]); | |
} | |
} | |
public void print(int[] array) { | |
for (int i = 0; i < array.length; i++) { | |
if (i != 0) { | |
writer.print(' '); | |
} | |
writer.print(array[i]); | |
} | |
} | |
public void print(double[] array) { | |
for (int i = 0; i < array.length; i++) { | |
if (i != 0) { | |
writer.print(' '); | |
} | |
writer.print(array[i]); | |
} | |
} | |
public void print(long[] array) { | |
for (int i = 0; i < array.length; i++) { | |
if (i != 0) { | |
writer.print(' '); | |
} | |
writer.print(array[i]); | |
} | |
} | |
public void println(int[] array) { | |
print(array); | |
writer.println(); | |
} | |
public void println(double[] array) { | |
print(array); | |
writer.println(); | |
} | |
public void println(long[] array) { | |
print(array); | |
writer.println(); | |
} | |
public void println() { | |
writer.println(); | |
} | |
public void println(Object... objects) { | |
print(objects); | |
writer.println(); | |
} | |
public void print(char i) { | |
writer.print(i); | |
} | |
public void println(char i) { | |
writer.println(i); | |
} | |
public void println(char[] array) { | |
writer.println(array); | |
} | |
public void printf(String format, Object... objects) { | |
writer.printf(format, objects); | |
} | |
public void close() { | |
writer.close(); | |
} | |
public void flush() { | |
writer.flush(); | |
} | |
public void print(long i) { | |
writer.print(i); | |
} | |
public void println(long i) { | |
writer.println(i); | |
} | |
public void print(int i) { | |
writer.print(i); | |
} | |
public void println(int i) { | |
writer.println(i); | |
} | |
public void separateLines(int[] array) { | |
for (int i : array) { | |
println(i); | |
} | |
} |
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Fast I/O for java coding challenges.