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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. int fun(int mid,int m){
  4.     int ans=1;
  5.     for(int i=1;i<=m;i++){
  6.         ans=ans*mid;
  7.     }
  8.     return ans;
  9. }
  10. int main()
  11. {
  12.     int n,m;
  13.     cin>>n>>m;
  14.  
  15.     int l=0,r=n;
  16.     while(l<=r){
  17.         int mid=l+(r-l)/2;
  18.         if(fun(mid,m)>n){
  19.             r=mid-1;
  20.         }
  21.         else if(fun(mid,m)<n){
  22.             l=mid+1;
  23.         }
  24.         else{
  25.             cout<<mid<<endl;
  26.             return 0;
  27.         }
  28.     }
  29.     cout<<m<<"th root of "<<n<<" is not possible( in integer)"<<endl;
  30.     return 0;
  31. }
Success #stdin #stdout 0.01s 5308KB
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stdin
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Standard input is empty
stdout
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32765th root of 198165936 is not possible( in integer)
https://ideone.com/VdAThy
language:
C++ (gcc 8.3)
created:
1 day ago
visibility:
public

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