果然是3越多越好、、滚回去学小学奥数算了、、、

然后就是高精度了、、比较脑残选择了手写、、更加脑残的选择了压位和快速幂、、然后跑的还行、、

代码越写越短了、、不过还有更短的比不过、、呵呵、、、

#include<iostream>
#include<cstring>
#include<cstdio>
#include<algorithm>
using namespace std;
typedef long long ll;
struct Hugeint{
    ll len,num[10000];  Hugeint(){  len=1ll;  memset(num,0,sizeof(num));}
}An;ll n,two,thr,p[]={1,10,100,1000};
Hugeint Mul(Hugeint a,Hugeint b){
    Hugeint c;  c.len=a.len+b.len+1;
    for(ll i=1;i<=a.len;i++) for(ll j=1;j<=b.len;j++)  c.num[i+j-1]+=a.num[i]*b.num[j];
    for(ll i=1;i<c.len;i++)  if(c.num[i]>9999)  c.num[i+1]+=c.num[i]/10000,  c.num[i]%=10000;
    while(c.num[c.len]>9999) c.len++,  c.num[c.len]+=c.num[c.len-1]/10000,   c.num[c.len-1]%=10000;
    while(c.num[c.len]==0&&c.len>1)  c.len--;   return c;
}Hugeint pow(ll b,ll p){
    Hugeint ans,bb; ans.len=bb.len=ans.num[1]=1ll;  bb.num[1]=b;
    while(p){if(p&1ll)ans=Mul(ans,bb);p>>=1ll;bb=Mul(bb,bb);}   return ans;
}inline int len(int x){
    int r=0; while(x)r++,x/=10; return r;
}void print(Hugeint a){
    if(a.len<=25){ printf("%lld",a.num[a.len]); for(ll i=a.len-1;i;i--)printf("%04lld",a.num[i]); return;} 
    printf("%lld",a.num[a.len]);    for(ll i=a.len-1;i>=a.len-24;i--)printf("%04lld",a.num[i]);
    if(len(a.num[a.len])<4) printf("%lld\n",a.num[a.len-25]/p[len(a.num[a.len])]);
}int main(){
    scanf("%lld",&n); two=0,thr=n/3;  if(n%3)two=2/(n%3),thr=(n-4/(n%3))/3; An=Mul(pow(2,two),pow(3,thr));
    printf("%lld\n",(An.len-1<<2)+len(An.num[An.len])); print(An);  return 0;
}

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