View Compilation Error

0_0_36572403_24474.cpp: In function 'int main()':
0_0_36572403_24474.cpp:78:6: error: redeclaration of 'long long int n'
  int n = 10;
      ^
0_0_36572403_24474.cpp:52:6: note: 'long long int n' previously declared here
  int n,k;
      ^