[BOJ] 백준 1193 분수찾기

[문제]

https://www.acmicpc.net/problem/1193

 

 

[소스 코드]

import java.io.*;
import java.util.*;
public class Main {
    public static void main(String[] args) throws IOException {
    	BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    	int n = Integer.parseInt(br.readLine());
    	int i = 1;
    	while(n>i) {
    		n -= i;
    		i++;
    	}
    	int a = n; 
    	int b = i+1 - n;
    	if(i%2==1) {
    		int temp = a;
    		a = b;
    		b = temp;
    	}
    	System.out.println(a+"/"+b);
    }
}

 

규칙찾기: 대각선 + 순서 (방향)