#include<stdio.h>
struct Square
{
    int edge,area;
};
int main()
{
    struct squares;
    scanf("%d",&s.edge);
    if(s.edge<=0)
    {
        printf("Invalid input");
        return 0;
    }
    s.area=s.edge*s.edge;
    printf("Area of square: %d square meters",s.area);
}