#include<stdio.h>
struct area;
{
    int n;
};
int main()
{
    int sum;
    struct area find;
    scanf("%d",&fint.n);
    if(find.n<0||find.n==0)
    {
        printf("Invalid input");
    }
    else
    {
        sum=find.n*find.n;
        printf("%d square meters",sum);
    }
}