백준 11005

▶ 11005번 문제 - 진법변환2

- 입력된 두 숫자 N, B

- 숫자 N을 B진법 형태로 변환하는 문제 ( N은 10억보다 작거나 같음(Long형),  B범위 : 2<= B <=36 )

 

▶ 풀이방법

import java.io.*;
import java.util.*;
public class Main {
	public static void main(String[] args) throws Exception{
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));
		Stack<Character> stack = new Stack<>();
		
		StringTokenizer st = new StringTokenizer(br.readLine());
		long a = Long.parseLong(st.nextToken());
		long b = Long.parseLong(st.nextToken());
		
		while(a > 0) {			
			stack.push((char)(ck(a, b)));
			
			a /= b;
		}
		
		while(!stack.isEmpty()) bw.write(stack.pop());
		bw.flush();
		bw.close();
		br.close();
	}
	private static long ck(long a, long b) {
		return a%b > 9 ? (a%b + 55) : (a%b + 48);
	}
}