#include <bits/stdc++.h>
using namespace std;

using ll = long long;
#define fi first
#define se second

int main(){
  ll x;
  cin>>x;
  if(x%2==1){
    cout<<1<<" "<<x-1<<" "<<x<<endl;
  }
  else{
    cout<<2<<" "<<x-2<<" "<<x<<endl;
  }
}