A. Link/Cut Tree
题目连接：
http://www.codeforces.com/contest/614/problem/A
Description
Programmer Rostislav got seriously interested in the Link/Cut Tree data structure, which is based on Splay trees. Specifically, he is now studying the expose procedure.
Unfortunately, Rostislav is unable to understand the definition of this procedure, so he decided to ask programmer Serezha to help him. Serezha agreed to help if Rostislav solves a simple task (and if he doesn't, then why would he need Splay trees anyway?)
Given integers l, r and k, you need to print all powers of number k within range from l to r inclusive. However, Rostislav doesn't want to spent time doing this, as he got interested in playing a network game called Agar with Gleb. Help him!
Input
The first line of the input contains three space-separated integers l, r and k (1 ≤ l ≤ r ≤ 1018, 2 ≤ k ≤ 109).
Output
Print all powers of number k, that lie within range from l to r in the increasing order. If there are no such numbers, print "-1" (without the quotes).
Sample Input
1 10 2
Sample Output
1 2 4 8
Hint
题意
给你l,r,k
让你输出k在[l,r]里面的幂
题解：
很水的题，但是会爆long long
所以在乘的时候注意一下，或者用python就好了
代码
#include<bits/stdc++.h>
using namespace std;
vector<long long> T;
int main()
{
long long l,r,k;
cin>>l>>r>>k;
int flag = 0;
long long tmp = 1;
while(tmp<=r)
{
if(tmp>=l)
{
T.push_back(tmp);
flag = 1;
}
if(r*1.0/tmp*1.0<k)
break;
tmp*=k;
}
if(!flag)cout<<"-1"<<endl;
else
{
for(int i=0;i<T.size();i++)
cout<<T[i]<<" ";
cout<<endl;
}
}