#include<stdio.h>
struct Square{
    int edge;
    int area;
};
int mani(){
    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;
}