View Compilation Error

0_0_29853644_8493.cpp: In function 'int main()':
0_0_29853644_8493.cpp:63:116: error: invalid initialization of reference of type 'll& {aka long long int&}' from expression of type 'int'
             add(ans, 1LL * phi[i] * (((3LL * i * Sum2(r / i)) % MOD + 3LL * Sum1(r / i) % MOD + r / i) % MOD) % MOD) ;
                                                                                                                    ^
0_0_29853644_8493.cpp:34:6: note: in passing argument 1 of 'void add(ll&, ll)'
 void add(ll &x, ll y) {
      ^