📍프로그래머스 java - 평행

 

 

[실패]

class Solution {
    public int solution(int[][] dots) {
        int answer = 0;
        int x1 = dots[0][0]; int y1 = dots[0][1]; 
        int x2 = dots[1][0]; int y2 = dots[1][1];
        int x3 = dots[2][0]; int y3 = dots[2][1]; 
        int x4 = dots[3][0]; int y4 = dots[3][1]; 
        
        if( x1 - x2 == x3 - x4){
            answer = 1;
        }
        else if (x1 - x3 == x2 - x4){
            answer = 1;
        }
        else if (x1 - x4 == x2 - x3){
            answer = 1;
        }
        else if( y1 - y2 == y3 - y4){
            answer = 1;
        }
        else if (y1 - y3 == y2 - y4){
            answer = 1;
        }
        else if (y1 - y4 == y2 - y3){
            answer = 1;
        }

        return answer;
    }
}