C

E BALAGURUSAMY
5.12

#include <stdio.h>

int main(){
char name[20];
double unit,charge;
scanf("%s %lf",&name,&charge);

if(unit>=300){
charge  = (unit-300) * 1;
charge = charge + 200 * .8;
charge = charge +  100 * .9;

else if(unit>=200){

charge = (unit- 200) * .8;
charge = charge +  100 * .9;
}

if (charge < 100){
charge = 100;
}else if (charge >= 400){
charge = charge + charge*15/100;
}
printf("%s %lf %lf",name,unit,charge);
}