[SWEA] 가랏! RC카!

https://swexpertacademy.com/main/code/problem/problemDetail.do?problemLevel=2&contestProbId=AV5PjMgaALgDFAUq&categoryId=AV5PjMgaALgDFAUq&categoryType=CODE&problemTitle=&orderBy=FIRST_REG_DATETIME&selectCodeLang=ALL&select-1=2&pageSize=10&pageIndex=3

SW Expert Academy

import java.util.Scanner;
import java.io.FileInputStream;


class Solution
{
	public static void main(String args[]) throws Exception
	{

		Scanner sc = new Scanner(System.in);
		int T;
		T=sc.nextInt();


		for(int test_case = 1; test_case <= T; test_case++)
		{
		  	int N = sc.nextInt();
            int distance=0;
            int speed=0;
            for(int i=0; i<N; i++){
                int a = sc.nextInt();
                int b=0;
                if(a!=0)
                    b= sc.nextInt();
                if(a==0)
                    distance += speed;
                else if(a==1){
                    speed += b;
                	distance +=speed;                    
                }
                else if(a==2){
                       speed -=b;
                       if(speed<0)
                        speed=0;
                    distance +=speed;
                }                   
            }
            System.out.println("#" + test_case + " " + distance);
		}
	}
}

 

속도 가속도 거리 따로 설정해주면 되고, 가속도가 음수가 되는 경우가 없다고 했으니 그 부분만 잘 걸어주면 된다.