[CodeForces][JAVA] 112A - Petya and Strings

StringBuilder클래스의 compareTo메소드 활용

이것의 존재를 몰라서 밑에 방식처럼 StringBuilder 전체 index를 for문으로 돌려가면서 해결함

근데 만약 문자의 길이가 크다면 밑에 방식이 더 빠를 것

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
 
 
public class Solution {
        
    private static BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    private static BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));
    
    public static void main(String[] args) throws IOException{
        StringBuilder firstString = new StringBuilder(br.readLine().toLowerCase());
        StringBuilder secondString= new StringBuilder(br.readLine().toLowerCase());
        
        int compareToResult = firstString.compareTo(secondString);
        int result = 0;
        if(compareToResult<0) result=-1;
        else if(compareToResult>0) result=1;
 
        bw.write(String.valueOf(result));
        bw.flush();
        
    }
}

 

Character클래스의 compare(A,B) 메소드 활용

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
 
 
public class Solution {
        
    private static BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    private static BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));
    
    public static void main(String[] args) throws IOException{
        StringBuilder firstString = new StringBuilder(br.readLine().toLowerCase());
        StringBuilder secondString= new StringBuilder(br.readLine().toLowerCase());
        
        for(int i=0; i<firstString.length(); i++) {
            char firstChar= firstString.charAt(i);
            char secondChar = secondString.charAt(i);
            if(Character.compare(firstChar, secondChar)>0) {
                System.out.println("1");
                return;
            }
            else if(Character.compare(firstChar, secondChar)<0) {
                System.out.println("-1");
                return;
            }
        }
        System.out.println(0);
    }
}