#include<stdio.h>
float main()
{
    float weight;
    scanf("%f",&weight);
    if(weight<1||weight<5)
{
    printf("invalid input");
}
    else if(weight<=5)
{
    printf("100 USD");
}
    else((weight>5)||(weight<=20))
{
    printf("200 USD");
}
   return 0;