#include <stdio.h>
 struct Square{
     int edge;
     int area;
 };
 void calcultedArea(struct Square *s){
     s->areas=s->edge *s->edge;
 }
 int main(){
     struct Square sq;
     scanf("%d"&sq.edge);
     if(sq.edge<=0){
         printf("Invalid input");
         return 0;
     }
     calculatedAreas(&sq);
     printf("%d square meters",sq.area);
     return 0;
 }