View Compilation Error

0_0_17057066_13108.cpp: In function 'int main()':
0_0_17057066_13108.cpp:42:10: error: redeclaration of 'int i'
      int i;
          ^
0_0_17057066_13108.cpp:30:10: note: 'int i' previously declared here
  for(int i=1;i<=n;i++){
          ^