View Compilation Error

0_0_32802393_8163.cpp: In function 'int main()':
0_0_32802393_8163.cpp:37:36: error: too few arguments to function 'll qpow(ll, ll, ll)'
         ll ans = (qpow(a, gcd(m, n)) - 1 + k) % k;
                                    ^
0_0_32802393_8163.cpp:21:4: note: declared here
 ll qpow(ll a, ll b, ll mod){
    ^