#include<stdio.h>
void calculate_square_area(int edge){
    if(edge<=0||edge>1000){
        printf("Invalid input");
    }else{
        int area=edge*edge;
        printf("%d square meters\n",area);
    }
}
int main(){
    int edge_length;
    scanf("%d",&edge_lendth);
    calculate_square_area(edge_length);
    
}