ep 07.문제 풀이

11653번: 소인수분해 (acmicpc.net)

11653번: 소인수분해

import java.util.Scanner;

public class Main
{
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int i = 2;
		
		while(i != 1){
		    if(n-i == 0){
		        System.out.println(n);
		        break;
		    }
		    
		    if (n % i == 0){
		        System.out.println(i);
		        n /= i;
		    }
		    else{
		        i+=1;
		    }
		    
		}
	}
}

1712번: 손익분기점 (acmicpc.net)

1712번: 손익분기점

import java.util.Scanner;

public class Main
{
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int a = sc.nextInt();
		int b = sc.nextInt();
		int c = sc.nextInt();
		
		int count = 1;
		if (c>b){
		    c -= b; 
		    while(a >= c){
		    count++;
		    a-=c;
		    }
		    System.out.println(count);
		}
		else{
		    System.out.print(-1);
		}
		
	}
}