// editor1
#include<stdio.h>
struct square
{
    int edge;
    int area;
};
int main()
{
    struct square s;
    scanf("%d", &s.edge);
    if(s.edge)<=0

    {
        printf("Invalid input");
    }
    else{
        s.area = s.edge"s.edge;
        printf("%d square meters",s.area);
}
return 0;
}