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Jan 30th, 2015
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C++ 0.30 KB | None | 0 0
  1. #include<iostream>
  2. #include <math.h>
  3. using namespace std;
  4.  
  5. long long pola(int n) {
  6.     if (n==0)
  7.         return 1;
  8.     long long k;
  9.     k=(2*n+1)*(2*n+1) - pola(n-1);
  10.     return k;
  11. }
  12.  
  13. int main () {
  14.     int T, n;
  15.     cin >> T;
  16.  
  17.     while (T > 0) {
  18.         T = T - 1;
  19.         cin >> n;
  20.         cout << pola(n) <<"\n";
  21.     }
  22.  
  23.     return 0;
  24. }
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