[SWEA] 9658 : 유효숫자 표기

https://swexpertacademy.com/main/code/problem/problemDetail.do?problemLevel=3&contestProbId=AXCjn9TKJmUDFAX0&categoryId=AXCjn9TKJmUDFAX0&categoryType=CODE&problemTitle=&orderBy=INQUERY_COUNT&selectCodeLang=JAVA&select-1=3&pageSize=10&pageIndex=3 

SW Expert Academy

숫자로는 안될 것 같아 String 사용하려다가 자르고 가져와야 해서 stringBuilder 사용함.

 

내 코드

메모리 : 37296 KB

시간 : 154 ms

코드길이 : 881 B

 

[내 코드]

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

public class Solution {

	public static void main(String[] args) throws IOException{
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		StringBuilder sb = new StringBuilder();
		
		int T = Integer.parseInt(br.readLine());
		for(int t = 1; t <= T; t++) {
			sb.append('#').append(t).append(' ');
			
			StringBuilder number = new StringBuilder();
			String original = br.readLine();
			number.append(original);
			int abs = number.length() - 1;
			
			String firstNum = original.substring(0, 3);
			double dbnum = Integer.parseInt(firstNum)*0.01;
			dbnum = Math.round(dbnum*10) / 10.0;
			if(dbnum == 10.0) {
				dbnum = 1.0;
				abs++;
			}
			
			sb.append(dbnum).append('*').append(10).append('^').append(abs).append('\n');
		}
		System.out.print(sb);
	}
}