View Compilation Error

0_0_38660919_20037.cpp:4:45: error: redefinition of 'long long int n'
 int n, sum = 1, f[30000010], mod = 1e9 + 7, n, m;
                                             ^
0_0_38660919_20037.cpp:4:5: note: 'long long int n' previously declared here
 int n, sum = 1, f[30000010], mod = 1e9 + 7, n, m;
     ^
0_0_38660919_20037.cpp: In function 'int main()':
0_0_38660919_20037.cpp:9:17: error: 't' was not declared in this scope
  scanf("%lld", &t);
                 ^