백준 1978번 : 소수 찾기

import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.util.Arrays; import java.util.StringTokenizer; public class Main { public void solution() throws IOException { BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); StringBuilder sb = new StringBuilder(); Boolean[] booleans = new Boolean[1001]; Arrays.fill(booleans, false)..

• format_list_bulleted 개발/알고리즘
• · 2022. 12. 27.
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백준 17425번 : 약수의 합

import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.util.Arrays; public class Main { public void solution() throws IOException { BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); StringBuilder sb = new StringBuilder(); long[] numArray = new long[1000001]; Arrays.fill(numArray,1); for(int i = 2; i

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• · 2022. 12. 25.
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백준 2609번 : 최대공약수와 최소공배수

import java.io.IOException; import java.io.InputStreamReader; import java.io.BufferedReader; import java.util.Arrays; import java.util.StringTokenizer; public class Main { public void solution() throws IOException { BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); StringTokenizer st = new StringTokenizer(br.readLine()); int a = Integer.parseInt(st.nextToken()); int b = I..

• format_list_bulleted 개발/알고리즘
• · 2022. 12. 24.
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백준 17427번 : 약수의 합2

import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; public class Main { public void solution() throws IOException { BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); int num = Integer.parseInt(br.readLine()); sumOfDivisor(num); } public void sumOfDivisor(int n){ long result = 0; for(int i = 1; i

• format_list_bulleted 개발/알고리즘
• · 2022. 12. 23.
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백준 1037번 : 약수

import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.util.Arrays; import java.util.StringTokenizer; public class Main { public void solution() throws IOException { BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); int count = Integer.parseInt(br.readLine()); StringTokenizer st = new StringTokenizer(br.readLine()); int[] ..

• format_list_bulleted 개발/알고리즘
• · 2022. 12. 23.
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백준 4375번 : 1

import java.util.Scanner; public class Main { public void solution(){ Scanner sc = new Scanner(System.in); while(sc.hasNextInt()){ int num = sc.nextInt(); int checkNumber = 0; int count = 0; while(true){ checkNumber = (checkNumber*10+1)%num; if(checkNumber==0){ count++; System.out.println(count); break; } count++; } } } public static void main(String[] args){ new Main().solution(); } } 처음엔 아래와 같..

• format_list_bulleted 개발/알고리즘
• · 2022. 12. 22.
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