View Compilation Error

0_0_30385408_7050.cpp: In function 'int main()':
0_0_30385408_7050.cpp:51:49: error: 'C' was not declared in this scope
                 dp[i]=dp[i-1]*C(num[i],num[i]>>1)%mod;
                                                 ^
0_0_30385408_7050.cpp:54:49: error: 'C' was not declared in this scope
                 dp[i]=dp[i-1]*C(num[i],num[i]>>1)*2%mod;
                                                 ^
0_0_30385408_7050.cpp:57:49: error: 'C' was not declared in this scope
                 dp[i]=dp[i-1]*C(num[i],num[i]>>1)%mod;
                                                 ^
0_0_30385408_7050.cpp:60:49: error: 'C' was not declared in this scope
                 dp[i]=dp[i-1]*C(num[i],num[i]>>1)%mod;
                                                 ^