fork download
copy 
  1. #include <iostream>
  2. #include <math.h>
  3. using namespace std;
  4. double root(double x, double k)
  5. {
  6.         double wynik;
  7.         wynik=exp((log(x))/k);
  8.         return wynik;
  9. }
  10. int main()
  11. {
  12.         unsigned int t;
  13.         cin >> t;
  14.         while(t--)
  15.         {
  16.                 int n;
  17.                 cin >> n;
  18.                 double *tab=new double[n];
  19.                 for(unsigned short i=0;i<n;i++)
  20.                 {
  21.                         cin >> tab[i];
  22.                 }
  23.                 unsigned int pot;
  24.                 double k=0.00, hist=-1.00;
  25.                 while(true)
  26.                 {
  27.                         double tmp, x;
  28.                         for(unsigned short i=0;i<n;i++)
  29.                         {
  30.                                 tmp+=((pow(tab[i],k))/n);
  31.                         }
  32.                         x=root(tmp,k);
  33.                         if(x>=4.00){pot=k; break;}
  34.                         else if(x==hist){pot=(-1); break;}
  35.                         hist=x;
  36.                         k++;
  37.                 }
  38.                 cout << pot << "\n";
  39.                 delete [] tab;
  40.                 tab=0;
  41.         }
  42. }
Success #stdin #stdout 0.02s 2860KB
comments (?)
stdin
copy 
4
5
1 2 3 1 3
4
1 2 3 5
5
1 1 5 1 1
2
4 2
stdout
copy 
647
0
0
0
https://ideone.com/IDpyB
language:
C++ (gcc 8.3)
created:
11 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!