Function prod

Codeforces_problems/Kevin and Grid/solution.cpp:87–91

    }
}
void prod(vector<cd> &a, vector<cd> &b, vector<cd> &c){
  for(int i=0;i<a.size();i++){
    c[i]=a[i]*b[i];
  }
}

int main(){
  long long int n,m,q;