Compiler message -output truncated

#1

#include<bits/stdc++.h>
using namespace std;
int main(){
int t;
cin>>t;
while(t–){
long long int n,k;
cin>>n>>k;
double p=1.0/k;
long long int ans=pow(n,p);
cout<<ans<<endl;
}

}
Fails for one test case, compiler displays message output truncated. I cannot figure out what it is failing on.
Thank You

#2

Actually the constraints are very large so the power function simply won’t work.It may work for some but not all. This question can be done using binary search.

#3

Yes leave this question for now till binary search is covered in the class