package MailTask;

import java.util.Arrays;

/**
 * Created by qurbonzoda on 16.12.15.
 */
public class BigNum {
    public static int SIZE = 100000;
    public static int BASE = 10;
    private char[] value = new char[SIZE];

    public BigNum() {
    }
    public BigNum(String string) {
        for (int i = 0; i < string.length(); i++) {
            value[string.length() - i - 1] = string.charAt(i);
        }
    }
    public BigNum(BigNum other) {
        value = Arrays.copyOf(other.value, SIZE);
    }

    public boolean equals(BigNum other) {
        return Arrays.equals(value, other.value);
    }

    public boolean isZero() {
        return equals(new BigNum());
    }

    @Override
    public String toString() {
        int last = lastNonZero();
        // if (last == 0) return "0";
        String string = new String(value, 0, last);
        StringBuilder stringBuilder = new StringBuilder(string);
        stringBuilder.reverse();
        return stringBuilder.toString();
    }

    private int lastNonZero() {
        int last = 0;
        for (int i = 0; i < value.length; i++) {
            if (value[i] != 0) {
                last = i + 1;
            }
        }
        return last;
    }
}