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@@ -0,0 +1,31 @@
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+#include<bits/stdc++.h>
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+using namespace std;
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+bool prime(int n){
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+ if(n <= 1)return false;
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+ if(n == 2)return true;
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+ if(n % 2 == 0)return false;
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+ for(int i = 3; i * i <= n; i+= 2){
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+ if( n % i == 0){
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+ return false;
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+ }
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+ }
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+ return true;
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+}
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+int main(){
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+ int n;
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+ cin >> n;
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+ if(n % 2 == 0){
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+ n -= 2;
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+ cout << 2;
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+ }else{
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+ n -= 3;
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+ cout << 3;
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+ }
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+ for(int i = 2; 2 * i <= n; i++){
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+ if(prime(i) and prime(n - i)){
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+ cout << ' ' << i << ' ' << n - i << endl;
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+ break;
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+ }
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+ }
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+ return 0;
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+}
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