#include<stdio.h>
struct square {
    int edge;
    int area;
};
int main(){
    struct square 5;
    scanf("%", &5.edge);
    if(5.edge <= 0){
        printf("Invalid input");
    }else{
        5.area = 5.edge = 5.edge;
        printf("%d square meters", 5.area);
    }
    return 0;
}