#include <stdio.h>

struct square{
    int edge;
    int area;
};

void calcuatedArea(struct squre *s){
    s->area = s->edge *s->edge;
}
int main(){
    struct square sq;
    
    scanf("%d",&sq.edge);
    
    if(sq.edge <= 0){
        printf("Invalid input");
        return 0;
    }
    calculeArea(&sq);
    
    printf("%d square meters");
    
    return 0;
}