#include<stdio.h>
struct square
{
    int edge;
    int area;
};
int main()
{
    struct squre s;
    scanf("%d",&s.edge);
    if(s.edge<=0 || s.edge< -1000 || s.edge>1000)
    {
        printf("Invalid Input");
        
    }
    else
    {
        s.area=s.edge*s.edge;
        pr
    }
}