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