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