[SWEA] [JAVA] [Difficulty 2] [1940] 가랏! RC카!

SW Expert Academy

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import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.StringTokenizer;

public class Solution {

	public static void main(String[] args) throws IOException {

		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		int T = Integer.parseInt(br.readLine()); // 테케 개수
		ArrayList<Integer> arr = new ArrayList<>(); // 정답을 저장할 list
		
		for (int i = 0; i < T; i++) {
			int N = Integer.parseInt(br.readLine()); // Command 횟수
			int speed = 0; // 속도
			int distance = 0; // 거리
			for (int j = 0; j < N; j++) {
				StringTokenizer st = new StringTokenizer(br.readLine());
				
				switch (Integer.parseInt(st.nextToken())) {
					case 1: // 가속
						speed += Integer.parseInt(st.nextToken());
						distance += speed;
						break;
						
					case 2: // 감속
                    // 3번째 제약사항 때문에 0으로 
						speed = Math.max(0, speed - Integer.parseInt(st.nextToken()));
						distance += speed;
						break;
						
					case 0: // 유지
						distance += speed;
						break;
				}
			}
			
			arr.add(distance);
			
		}
		
		for(int i=1; i<=T; i++) {
			System.out.println("#" + i + " " + arr.get(i-1));
		}
	}
}