| # | Time | Username | Problem | Language | Result | Execution time | Memory |
|---|---|---|---|---|---|---|---|
| 39212 | qoo2p5 | Toll (APIO13_toll) | C++14 | 0 ms | 0 KiB |
This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
package ru.sirius.lambdas;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.List;
import java.util.Random;
import java.util.function.Function;
public class LambdasExpressionTest {
public static final String ALPHABET = "ABSCEFGIHJKLMNOPQRSTUVXWZ";
private static final int MAX_WORD_LENGTH = 10;
public static final Calendar CALENDAR = Calendar.getInstance();
public static final SimpleDateFormat SDF = new SimpleDateFormat();
static {
SDF.applyPattern("MM/dd/yyyy");
}
public static void main(String[] args) {
final List<Book> books = new ArrayList<>();
final Random random = new Random();
for (int i = 0; i < 1000; i++) {
final Book book = Book.builder()
.author(generateString(random, ALPHABET, 2))
.code(generateString(random, ALPHABET, 1))
.receiverCode(random.nextInt())
.title(generateString(random, ALPHABET, Math.abs(1 + random.nextInt(4))))
.date(generateYearString(random))
.build();
books.add(book);
}
books.stream()
.filter(book -> Book.isOld(book) && book.getAuthor().startsWith("A"))
.map(Book::getAuthor)
.forEach(System.out::println);
}
interface CheckBook {
boolean check(Book book) throws ParseException;
}
public static class CheckOldBookWithFamousAuthors implements CheckBook {
@Override
public boolean check(Book book) throws ParseException {
CALENDAR.setTime(SDF.parse(book.getDate()));
int year = CALENDAR.get(Calendar.YEAR);
return year <= 1918 && book.getAuthor().startsWith("A");
}
}
public static void printOldBooksWithFamousAuthors(List<Book> books, CheckBook checker) throws ParseException {
for (Book book : books) {
if (checker.check(book)) {
System.out.println(String.valueOf(book));
}
}
}
//метод, который ищет, к примеру что-то по одной характеристике:
public static void printBookOlderThen(List<Book> books,
int year) throws ParseException {
for (Book book : books) {
CALENDAR.setTime(SDF.parse(book.getDate()));
int bookYear = CALENDAR.get(Calendar.YEAR);
if (bookYear < year) {
System.out.println(book);
}
}
}
public static void printBookInRange(List<Book> books,
int yearStart, int yearEnd) throws ParseException {
for (Book book : books) {
CALENDAR.setTime(SDF.parse(book.getDate()));
int bookYear = CALENDAR.get(Calendar.YEAR);
if (bookYear > yearStart && bookYear < yearEnd) {
System.out.println(book);
}
}
}
private static String generateYearString(Random random) {
int year = 1819 + Math.abs(random.nextInt(2018 - 1819));
CALENDAR.set(Calendar.YEAR, year);
int dayOfYear = 1 + Math.abs(random.nextInt(CALENDAR.getActualMaximum(Calendar.DAY_OF_YEAR)));
CALENDAR.set(Calendar.DAY_OF_YEAR, dayOfYear);
return SDF.format(CALENDAR.getTime());
}
private static String generateString(Random random, String alphabet, int words) {
final StringBuilder builder = new StringBuilder();
for (int i = 0; i < words; i++) {
for (int j = 0; j < MAX_WORD_LENGTH; j++) {
builder.append(alphabet.charAt(random.nextInt(alphabet.length())));
}
builder.append(" ");
}
return builder.toString();
}
}