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