View Compilation Error

0_0_14807025_13837.cpp: In function 'll china(ll, ll*, ll*)':
0_0_14807025_13837.cpp:64:8: error: 'i' was not declared in this scope
     ff(i, n) {  
        ^
0_0_14807025_13837.cpp:64:12: error: 'ff' was not declared in this scope
     ff(i, n) {  
            ^
0_0_14807025_13837.cpp: In function 'int main()':
0_0_14807025_13837.cpp:94:31: error: cannot convert 'int*' to 'll* {aka long long int*}' for argument '2' to 'll china(ll, ll*, ll*)'
         ll ans = china(k, a, p);
                               ^