30 lines
493 B
Java
30 lines
493 B
Java
package chelper;
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import java.util.ArrayList;
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import java.util.List;
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import io.InputReader;
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import io.OutputWriter;
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public class A {
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public void solve(int testNumber, InputReader in, OutputWriter out) {
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int n = in.nextInt();
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List<Integer> res = new ArrayList<>();
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if (n % 2 == 1) {
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res.add(3);
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n -= 3;
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}
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for (int i = 0; i < n / 2; i++) {
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res.add(2);
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}
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out.println(res.size());
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for (int i : res) {
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out.print(i + " ");
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}
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}
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}
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