#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
    {
        5.area - 5.edge * s.edge;
        printf("%d square meters",s.area);
    }
    return 0;
    
}