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