题解 | #整数转罗马数字#

import java.util.*;

/**
 * NC361 整数转罗马数字
 * @author d3y1
 */
public class Solution {
    /**
     * 代码中的类名、方法名、参数名已经指定，请勿修改，直接返回方法规定的值即可
     *
     *
     * @param n int整型 
     * @return string字符串
     */
    public String ArabicToRoman (int n) {
        int[] arabicArr = new int[]{1000,900,500,400,100,90,50,40,10,9,5,4,1};
        String[] romanArr = new String[]{"M","CM","D","CD","C","XC","L","XL","X","IX","V","IV","I"};

        StringBuilder sb = new StringBuilder();

        // 贪心
        int i = 0;
        while(n != 0){
            while(i<arabicArr.length && n<arabicArr[i]){
                i++;
            }
            sb.append(romanArr[i]);
            n -= arabicArr[i];
        }
        return sb.toString();
    }
}