[백준 1543] 문서 검색

1543번: 문서 검색

내 풀이

import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String str1 = sc.nextLine();
        String str2 = sc.nextLine();

        int maxCount = 0;
        while(str1.contains(str2)){
            maxCount++;
            int restartIndex = str1.indexOf(str2) + str2.length();
            str1 = str1.substring(restartIndex);
        }
        System.out.println(maxCount);

    }
}

답안1

import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String doc = sc.nextLine();
        String word = sc.nextLine();

        int count = 0;
        int startIndex = 0;
        while(true) {
            int findIndex = doc.indexOf(word, startIndex);
            if (findIndex < 0)
                break;
            count++;
            startIndex = findIndex + word.length();
        }
        System.out.println(count);
    }
}

indexOf 이용

답안2

import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String doc = sc.nextLine();
        String word = sc.nextLine();

        String replaced = doc.replace(word, "");
        int length = doc.length() - replaced.length();
        int max = length / word.length();
        System.out.println(max);


    }
}

replace이용