[백준 Java]15552 : 빠른 A+B

1. 문제

2. 맞춘코드

// [백준 Java]15552 : 빠른 A+B
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.IOException;
import java.util.StringTokenizer;


public class bj15552{
	public static void main(String[] args) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		StringTokenizer st;
		StringBuilder sb = new StringBuilder();

		int num=Integer.parseInt(br.readLine());

		for(int i=0; i<num; i++){
			st = new StringTokenizer(br.readLine(), " ");
			sb.append(Integer.parseInt(st.nextToken()) + Integer.parseInt(st.nextToken())).append("\n");
		}
		br.close();
		System.out.println(sb);
	}
}

3. 틀린코드

3.1. 시간초과: 테스트 케이스마다 System.out.println() 을 호출

// [백준 Java]15552 : 빠른 A+B
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.IOException;
import java.util.StringTokenizer;


public class bj15552{
	public static void main(String[] args) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		StringTokenizer st;

		int num=Integer.parseInt(br.readLine());

		for(int i=0; i<=num; i++){
			st = new StringTokenizer(br.readLine(), " ");
			int a=Integer.parseInt(st.nextToken());
			int b=Integer.parseInt(st.nextToken());
			
			System.out.println(a+b);

		}
	}
}

4. 참고사이트

https://st-lab.tistory.com/30