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Main.java
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44 lines (39 loc) · 1.2 KB
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import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Arrays;
import java.util.StringTokenizer;
public class Main {
public static void main(String[] args) throws IOException {
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
int N = Integer.parseInt(br.readLine());
StringTokenizer st = new StringTokenizer(br.readLine());
int[] numbers = new int[N];
int i = 0;
while (st.hasMoreTokens()) {
numbers[i] = Integer.parseInt(st.nextToken());
i++;
}
int[] numberList = new int[1001];
Arrays.fill(numberList, 0);
for (int j = 2; j <= 1000; j++) {
int flag = 0;
for (int k = 2; k < j; k++) {
if (j % k == 0) {
flag = 1;
break;
}
}
if (flag == 0) {
numberList[j] = 1;
}
}
int total = 0;
for (int n = 0; n < numbers.length; n++) {
if (numberList[numbers[n]] == 1) {
total += 1;
}
}
System.out.println(total);
}
}