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