Integer to Roman

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public class Solution {    public String intToRoman(int num) {        String[][] c= new String[][]{{"0","I","II","III","IV","V","VI","VII","VIII","IX"},{"0","X","XX","XXX","XL","L","LX"                ,"LXX","LXXX","XC"},{"0","C","CC","CCC","CD","D", "DC","DCC","DCCC","CM"},{"0","M","MM","MMM"}};        int tmp=num;        String st = "";        if(tmp/1000!=0) st+=c[3][tmp/1000];        if((tmp%1000)/100!=0) st+=c[2][(tmp%1000)/100];        if((tmp%100)/10!=0) st+=c[1][(tmp%100)/10];        if(tmp%10!=0) st+=c[0][tmp%10];        return st;    }}

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