1475 방번호

https://www.acmicpc.net/problem/1475

1475번: 방 번호

 

 

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

public class Main {

	  public static void main(String[] args) throws IOException {

		  
		  BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		  String s = br.readLine();
		  s= s.replace('9','6');
		  int N = s.length();
		  
		  int a[] = new int [9];
	
		  
		  
		  for(int i=0; i<N;i++) {
			  int number = s.charAt(i)-'0';
			  a[number]++;
		  }
		  
		  if(a[6]!=0) {
		  a[6] = Math.round(a[6]/2.0f);
		  }
		  
		  int max =0;
		  for(int i=0; i<9;i++) {
			  max = Math.max(a[i], max);
		  }
		  
		  System.out.println(max);
				
		  }  
	    	}

 

참고 자료 : 

https://youjourney.tistory.com/42

[백준] 방 번호 (1475)(java)