#include<stdio.h>
struct Square
{
    int edge;
    int area;
};
int main()
{
    struct Square sq;
    scanf("%d",&sq.edge);
    if(sq.edge<=0)
    {
        printf("Invalid input\n");
    }else{
        sq.area=sq.edge*sq.edge'
        printf("%d square meters\n",sq.area);
    }
    return 0;
}