POJ 2109

 1 #include<iostream>
 2 #include<stdio.h>
 3 #include<math.h>
 4 using namespace std;
 5
 6 int main()
 7 {
 8     //freopen("acm.acm","r",stdin);
 9     long double num;
10     long double k;
11     while(cin>>num>>k)
12     {
13         cout<<pow(k,1.0/num)<<endl;
14     }
15 }