백준[Java] 10950번 A+B-3

https://www.acmicpc.net/problem/10950

10950번: A+B - 3

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문제풀이 1

import java.util.Scanner;
public class _10950_1 {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        int T = sc.nextInt();

        for (int i = 0; i < T; i++) {
            int A = sc.nextInt();
            int B = sc.nextInt();
            System.out.println(A+B);
        }
        sc.close();
    }
}

Scanner 사용

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문제풀이 2

import java.util.Scanner;

public class _10950_2 {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        int T = sc.nextInt();
        int arr[] = new int[T];

        for (int i = 0; i < T; i++) {
            int A = sc.nextInt();
            int B = sc.nextInt();
            arr[i] = A + B;
        }
        sc.close();

        for (int j : arr) {
            System.out.println(j);
        }
    }
}

 

배열과 향상된 for 문 사용

for (타입 변수명 : 배열 또는 컬렉션) {
    // 반복할 문장
}

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문제풀이 3

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

public class _10950_3 {
    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

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

        StringTokenizer st;
        StringBuilder sb = new StringBuilder();

        for (int i = 0; i < T; i++) {
            st = new StringTokenizer(br.readLine());
            sb.append(Integer.parseInt(st.nextToken()) + Integer.parseInt(st.nextToken()));
            sb.append('\n');
        }
        System.out.println(sb);
    }
}

BufferedReader 와 StringTokenizer 사용