72 lines
1.9 KiB
Java
72 lines
1.9 KiB
Java
package reverse;
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import java.io.BufferedReader;
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import java.io.IOException;
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import java.io.InputStreamReader;
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/**
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* @author Nikita Doschennikov (me@fymio.us)
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*/
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public class FastScanner {
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BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
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String line = null;
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int pos = 0;
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boolean hasNextLine() throws IOException {
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if (line != null && pos < line.length()) return true;
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line = br.readLine();
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pos = 0;
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return line != null;
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}
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boolean hasNextInt() {
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if (line == null) return false;
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while (
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pos < line.length() &&
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(Character.isWhitespace(line.charAt(pos)) ||
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Character.getType(line.charAt(pos)) ==
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Character.START_PUNCTUATION ||
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Character.getType(line.charAt(pos)) ==
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Character.END_PUNCTUATION)
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) {
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pos++;
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}
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return (
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pos < line.length() &&
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(Character.isDigit(line.charAt(pos)) || line.charAt(pos) == '-')
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);
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}
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int nextInt() {
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while (
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pos < line.length() &&
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(Character.isWhitespace(line.charAt(pos)) ||
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Character.getType(line.charAt(pos)) ==
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Character.START_PUNCTUATION ||
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Character.getType(line.charAt(pos)) ==
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Character.END_PUNCTUATION)
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) {
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pos++;
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}
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int start = pos;
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boolean negative = line.charAt(pos) == '-';
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if (negative) pos++;
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while (pos < line.length() && Character.isDigit(line.charAt(pos))) {
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pos++;
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}
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int result = 0;
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for (int i = negative ? start + 1 : start; i < pos; i++) {
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result = result * 10 + (line.charAt(i) - '0');
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}
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return negative ? -result : result;
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}
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void nextLine() {
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pos = line.length();
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}
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}
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