[백준] 10101번 : 삼각형 외우기 - Dart(다트)

https://www.acmicpc.net/problem/10101

import 'dart:io';
void main(){
    int? a=int.parse(stdin.readLineSync()!);
    int? b=int.parse(stdin.readLineSync()!);
    int? c=int.parse(stdin.readLineSync()!);
    var sum=a+b+c;
    if(sum==180){
        if(a==60 && b==60 && c==60) print("Equilateral");
        else if(a==b || b==c || a==c) print("Isosceles");
        else print("Scalene");
    }
    else print("Error");
}