View Compilation Error

0_0_36371996_20783.cpp: In function 'int main()':
0_0_36371996_20783.cpp:30:39: error: no match for call to '(std::vector<std::pair<long long int, long long int> >) (std::pair<long long int, long long int>)'
   ans[1][1](make_pair(a[1][1],b[1][1]));
                                       ^