Не правильно считает, например, 9^18, мой вывод:
150094635296999121150094635296999140private static BigInteger[][] digitArray(){
BigInteger[][] digitArray = new BigInteger[9][19];
for (int i = 0; i < 9; i++){
BigInteger digit = BigInteger.valueOf(i + 1);
for (int j = 0; j < 19; j++ ){
digitArray[i][j] = digit.pow(j+1);
}
}
return digitArray;
}package com.javarush.task.task20.task2025;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
/*
Алгоритмы-числа
*/
public class Solution {
public static long[] getNumbers(long N) {
for (long i = 1; i < N; i ++){
int len = String.valueOf(i).length();
long sum = 0;
int digit;
long number = i;
for (int k = 0; k < len; k++){
long numbPow = 1;
digit = (int)number % 10;
for (int n = 0; n < len; n++){
numbPow *= digit;
}
sum += numbPow;
number /= 10;
//System.out.println(numbPow + " " + number + " " + N);
}
if (sum == i)
System.out.println(sum);
}
long[] result = null;
return result;
}
public static void main(String[] args) {
long a = System.currentTimeMillis();
System.out.println(Arrays.toString(getNumbers(1000)));
long b = System.currentTimeMillis();
System.out.println("memory " + (Runtime.getRuntime().totalMemory() - Runtime.getRuntime().freeMemory()) / (8 * 1024));
System.out.println("time = " + (b - a) / 1000);
a = System.currentTimeMillis();
System.out.println(Arrays.toString(getNumbers(1000000)));
b = System.currentTimeMillis();
System.out.println("memory " + (Runtime.getRuntime().totalMemory() - Runtime.getRuntime().freeMemory()) / (8 * 1024));
System.out.println("time = " + (b - a) / 1000);
}
}