View Compilation Error

0_0_36509832_22867.cpp: In function 'std::vector<int> MTT::conv(std::vector<int>, std::vector<int>)':
0_0_36509832_22867.cpp:101:113: error: 'PHI' was not declared in this scope
             res.push_back((1LL*((ll)(c1[i].x)%TMOD)*M%TMOD*M%TMOD+1LL*((ll)(c2[i].x)%TMOD)*M%TMOD+(ll)(c3[i].x)%PHI)%TMOD);
                                                                                                                 ^