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