[브론즈 III] 5217번 :: 쌍의 합 / Java

 

 

 

 

문제

https://www.acmicpc.net/problem/5217

5217번: 쌍의 합

 

 

 

 

 

코드

import java.util.ArrayList;
import java.util.Scanner;

public class b5217 {
    private static ArrayList<Integer> solveSumPairs(int target) {
    	
    	ArrayList<Integer> answer = new ArrayList<Integer>();
    	
    	/* ------------------- INSERT CODE HERE ---------------------*/

    	// answer.add(x);		// adds x to ArrayList<Integer> answer
        int x = 1;
    	while(true) {

            if(x==target) break;

            int y = target-x;

            if(x<y && y!=0) {
                answer.add(x);
                answer.add(y);
            }

            x++;
        }
        /* -------------------- END OF INSERTION --------------------*/
    	
    	return answer;
    }
    
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        int numCases = sc.nextInt();

        for(int n = 0; n < numCases; n++)
        {
            int target = sc.nextInt();
            
            ArrayList<Integer> answer = solveSumPairs(target);
            
            System.out.print("Pairs for "+target+": ");
            
            for (int i = 0; i<answer.size(); i+=2 ) {
            	if (i>0) 
            		System.out.print(", ");
            	System.out.print(answer.get(i) + " " + answer.get(i+1));
            }
            System.out.println();
        }
    }
}