ZZULIOJ 1052: 数列求和4，Java

1052: 数列求和4

import java.util.Scanner;
public class Main {
    public static void main(String[] args) {
    Scanner cin = new Scanner(System.in);int n=cin.nextInt();int item=cin.nextInt();int sum=0,ans=item;for(int i=1;i<=n;i++){
    sum+=ans;ans=ans*10+item;}System.out.printf("%d",sum);}
}