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| import java.util.NavigableMap; | |
| import java.util.TreeMap; | |
| import java.util.concurrent.atomic.AtomicInteger; | |
| import java.util.stream.Stream; | |
| public class Fibonacci { | |
| public static final Fibonacci BASE = new Fibonacci(0, 1); | |
| public final int previous; | |
| public final int current; | |
| public Fibonacci(int previous, int current) { | |
| this.previous = previous; | |
| this.current = current; | |
| } | |
| public Fibonacci next() { | |
| return new Fibonacci(current, current + previous); | |
| } | |
| public static int of(int number) { | |
| return Stream.iterate(Fibonacci.BASE, Fibonacci::next) | |
| .limit(number + 1) | |
| .reduce((a,b)->b) | |
| .map(e->e.previous).orElse(0); | |
| } | |
| public static void main(String[] args) { | |
| System.out.println(Fibonacci.of(10)); | |
| } | |
| } |
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