View Compilation Error

0_0_36335499_13950.cpp: In function 'll q_pow(ll, ll, ll)':
0_0_36335499_13950.cpp:43:25: error: too few arguments to function 'll mul(__int128, ll, ll)'
   if(k & 1) s = mul(s, a);
                         ^
0_0_36335499_13950.cpp:33:4: note: declared here
 ll mul(__int128 a, ll b, ll mod)
    ^
0_0_36335499_13950.cpp:44:15: error: too few arguments to function 'll mul(__int128, ll, ll)'
   a = mul(a, a);
               ^
0_0_36335499_13950.cpp:33:4: note: declared here
 ll mul(__int128 a, ll b, ll mod)
    ^