[백준] 14470번 : 전자레인지 - Dart(다트)

https://www.acmicpc.net/problem/14470

import 'dart:io';
import 'dart:math';
void main(){
    int a=int.parse(stdin.readLineSync()!);
    int b=int.parse(stdin.readLineSync()!);
    int c=int.parse(stdin.readLineSync()!);
    int d=int.parse(stdin.readLineSync()!);
    int e=int.parse(stdin.readLineSync()!);
    var time=0;
    if(a<0){
        time+=(a).abs()*c;
        a=0;
    } 
    if(a==0) time+=d;
    time+=(b-a)*e;
    print(time);
}