Created
May 10, 2018 03:35
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백준 6588 골드바흐의 추측
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import java.util.Scanner; | |
public class Main { | |
public static final int MAX = 1000000; | |
public static void main(String[] args) { | |
Scanner sc = new Scanner(System.in); | |
boolean[] isPrime = new boolean[MAX+1]; | |
for(int i = 2; i <= MAX; i++) { | |
isPrime[i] = true; | |
} | |
for(int i = 2; i <= MAX; i++) { | |
for(int j = i * 2; j <= MAX; j += i) { | |
if(!isPrime[j]) continue; | |
isPrime[j] = false; | |
} | |
} | |
while(true) { | |
int n = sc.nextInt(); | |
boolean ok = false; | |
if(n == 0) | |
break; | |
for(int i = 2; i <= n/2; i++) { | |
if(isPrime[i] && isPrime[n-i]) { | |
System.out.println(n + " = " + i + " + " + (n-i)); | |
ok = true; | |
break; | |
} | |
} | |
if(!ok) | |
System.out.println("Goldbach's conjecture is wrong."); | |
} | |
} | |
} |
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