#include<stdio.h>
int main()
{
    int n;
    scanf("%d",&n);
    if(n<=0)
    {
        printf("Invalid input");
        return 0;
    }
    int temp=n;
    int sum=0
    while(temp>0)
    {
        sum=sum+(temp%10);
        temp=temp/10;
    }
    int res=sum*sum;
    printf("%d",res);
    return 0;
}