View Compilation Error

0_0_34057540_18982.cpp: In function 'int main()':
0_0_34057540_18982.cpp:114:21: error: too many arguments to function 'std::vector<int> NTT_times(std::vector<int>, std::vector<int>)'
   NTT_times(a,xs,ans);
                     ^
0_0_34057540_18982.cpp:47:13: note: declared here
 vector<int> NTT_times(vector <int> a,vector <int> b){
             ^