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- #include<bits/stdc++.h>
- using namespace std;
- // #pragma GCC optimize("Ofast,no-stack-protector")
- // #pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
- // #pragma GCC optimize("unroll-loops")
- typedef unsigned long long ull;
- typedef long long ll;
- typedef long double lld;
- typedef vector<int> vi;
- typedef vector<ll> vll;
- typedef vector<vi> vvi;
- typedef pair<int,int > pii;
- typedef vector< pii > vpii;
- typedef set<int> sti;
- #define sc scanf
- #define pf printf
- #define sci(n) scanf("%d",&n)
- #define scii(n,m) scanf("%d %d",&n,&m)
- #define scl(n) scanf("%lld",&n)
- #define scd(n) scanf("%lf",&n)
- #define scs(s) scanf("%s",s)
- #define pfi(n) printf("%d",n)
- #define pfl(n) printf("%lld",n)
- #define pff(n) cout<<n
- #define spc printf(" ")
- #define line printf("\n")
- #define loop(i,x,y) for(int i=int(x); i<=int(y); i++)
- #define rloop(i,y,x) for(int i=int(y); i>=int(x); i--)
- #define cspf(i) printf("Case %d: ", i)
- #define vout(v) for(int w=0;w<v.size();w++){if(w) cout<<' '; cout<<v[w];}
- #define clr(a,x) memset(a,x,sizeof(a))
- #define tp(v,j) get<j>(v)
- #define pb push_back
- #define mp make_pair
- #define mt make_tuple
- #define ff first
- #define ss second
- #define all(v) v.begin(),v.end()
- #define rall(v) v.rbegin(),v.rend()
- #define read() freopen("input.txt", "r", stdin)
- #define write() freopen("output.txt", "w", stdout)
- #define fastIO() ios_base::sync_with_stdio(false); cin.tie(NULL);
- /// Constants
- #define eps 1e-6
- #define PI acos(-1.0) // 3.1415926535897932
- #define MAX (ll)2147483647
- #define MAXn (ll)10000001
- int GCD(int a, int b) { return b == 0 ? a : GCD(b , a % b); }
- ll LCM(ll a, ll b) { return a * (b/GCD(a, b)); }
- bool isprime[MAXn+1];
- vll primes;
- void seive()
- {
- clr(isprime,true);
- isprime[0]=false;
- isprime[1]=false;
- for(int i=4;i<MAXn;i+=2) isprime[i]=false;
- for(int i=3;i*i<MAXn;i+=2){
- if(!isprime[i]) continue;
- for(int j=i*i;j<MAXn;j+=2*i) isprime[j]=false;
- }
- primes.pb(2LL);
- for(int i=3;i<MAXn;i+=2){
- if(isprime[i]) primes.pb((ll)i);
- }
- }
- int main()
- {
- #ifdef VAMP
- clock_t tStart = clock();
- freopen("input.txt", "r", stdin);
- freopen("output.txt", "w", stdout);
- #endif
- seive();
- ll x;
- while(~scl(x)){
- if(x<8LL) pf("Impossible.\n");
- else{
- bool f=false;
- ll a,b,c,d;
- if(x%2LL==0LL) a=b=2LL;
- else a=2LL,b=3LL;
- x-=(a+b);
- for(int i=0;primes[i]<x;i++){
- ll y = x-primes[i];
- if(isprime[y]){
- c=primes[i];
- d=y;
- f=true;
- break;
- }
- }
- if(f) pf("%lld %lld %lld %lld\n",a,b,c,d);
- else pf("Impossible.\n");
- }
- }
- #ifdef VAMP
- fprintf(stderr, "\n>> Runtime: %.10fs\n", (double) (clock() - tStart) / CLOCKS_PER_SEC);
- #endif
- return 0;
- }
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