Tarai.java

import java.time.Duration;
import java.time.LocalDateTime;
import java.time.Period;
import java.time.ZoneId;

public class Tarai {

    public static  int tarai(int x, int y, int z) {
        if(x <= y) {
            return y;
        } else {
            return tarai(tarai(x - 1, y, z), tarai(y - 1, z, x), tarai(z - 1, x, y));
        }
    }

    public static void main(String[] args) {
        LocalDateTime t1 = LocalDateTime.now();
        int n = tarai(14, 8, 0);
        LocalDateTime t2 = LocalDateTime.now();
        System.out.println(n);

        Duration duration = Duration.between(t1, t2);
        System.out.println(duration);
    }

}