#include<stdio.h>
int main()
{
    float weight;
    scanf("%f",&weight);
    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("Invalid input");
    }
    return 0;
}