View Compilation Error

0_0_36527241_25547.cpp: In function 'void __Run_Case(int)':
0_0_36527241_25547.cpp:71:37: error: too few arguments to function 'long long int qpow(long long int, long long int)'
             fm = 1ll*fm*qpow(2*n-i-j)%mod;
                                     ^
0_0_36527241_25547.cpp:46:11: note: declared here
 inline ll qpow(ll a, ll b)
           ^