#include<stdio.h>
int main()
{
    float weight;
    scanf("%f",&weight);
    if(weight<1||weight>100)
    {
        printf("Invalid input");
    }
    else if(weight>=1 && weight<=5)
    {
    printf("100 USD");
    } 
    else if(weight>5 && weight<=20);
    {
        printf("200 USD");
    }
    else if(weight>20 && weight<=50)
    {
        printf("300 USD");
    }
    else
    {
        printf("500 USD");
    }
    return 0;
}