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Q9020.java
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Q9020.java
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package forRank;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.util.Arrays;
public class Q9020 {
private static final int LAST = 10000;
public static void main(String[] args) throws IOException {
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));
//get primes
boolean prime[] = new boolean[LAST + 1];
Arrays.fill(prime, true);
prime[1] = false;
for (int i = 4; i <= LAST; i+= 2)
prime[i] = false;
for (int i = 3; i * i <= LAST; i += 2) {
for (int j = i * 2; j <= LAST; j += i) {
prime[j] = false;
}
}
//algorithm
int T = Integer.parseInt(br.readLine());
for (int i = 0; i < T; i++) {
int num = Integer.parseInt(br.readLine());
for (int j = num / 2; j > 1; j--) {
if(prime[num - j] && prime[j]){
bw.write(j + " " + (num - j) + "\n");
break;
}
}
}
br.close();
bw.close();
}
}