View Compilation Error

0_0_26433532_26737.cpp: In function 'int main()':
0_0_26433532_26737.cpp:63:19: error: 'std::unordered_map<int, int>::iterator' has no member named 'second'
             if(it.second > 0)
                   ^
0_0_26433532_26737.cpp:64:36: error: 'std::unordered_map<int, int>::iterator' has no member named 'first'
                 up *= quick_pow(it.first, it.second);
                                    ^
0_0_26433532_26737.cpp:64:46: error: 'std::unordered_map<int, int>::iterator' has no member named 'second'
                 up *= quick_pow(it.first, it.second);
                                              ^
0_0_26433532_26737.cpp:66:36: error: 'std::unordered_map<int, int>::iterator' has no member named 'first'
                 dw *= quick_pow(it.first, -it.second);
                                    ^
0_0_26433532_26737.cpp:66:47: error: 'std::unordered_map<int, int>::iterator' has no member named 'second'
                 dw *= quick_pow(it.first, -it.second);
                                               ^