Today is Yukari‘s n-th birthday. Ran and Chen hold a celebration party for her. Now comes the most important part, birthday cake! But it‘s a big challenge for them to place n candles on the top of the cake. As Yukari has lived for
such a long long time, though she herself insists that she is a 17-year-old girl.
To make the birthday cake look more beautiful, Ran and Chen decide to place them like r ≥ 1 concentric circles. They place ki candles equidistantly on the i-th circle, where k ≥ 2, 1 ≤ i ≤ r. And it‘s optional to place at most one candle at the center
of the cake. In case that there are a lot of different pairs of r and k satisfying these restrictions, they want to minimize r × k. If there is still a tie, minimize r.
There are about 10,000 test cases. Process to the end of file.
Each test consists of only an integer 18 ≤ n ≤ 1012.
For each test case, output r and k.
1 17
2 10
3 10
# include<iostream>
# include<cstdio>
# include<cstring>
# include<algorithm>
# include<cmath>
# define lh __int64
using namespace std;
lh powll(lh x,int y)
{
lh res=1;
for(int i=0;i<y;i++)
{
res*=x;
}
return res;
}
int main()
{
lh n;
lh r,k;
while(~scanf("%I64d",&n))
{
r=1;
k=n-1;
lh ll,rr,mm;
for(int i=2;i<=45;i++)
{
ll=2;
rr=(lh)pow(n,1.0/i); //规定上界
while(ll<=rr)
{
mm=(lh)(ll+rr)/2;
lh ans=(mm-powll(mm,i+1))/(1-mm);
if(ans==n||ans==n-1)
{
if(i*mm<r*k)
{
r=i;
k=mm;
}
break;
}
else if(ans>n)
rr=mm-1;
else
ll=mm+1;
}
}
printf("%I64d %I64d\n",r,k);
}
return 0;
}