View Compilation Error

0_0_34110688_27357.cpp: In function 'void add(int, int)':
0_0_34110688_27357.cpp:27:44: error: 'edge' was not declared in this scope
 inline void add(int x, int y) {e[++tot] = (edge){y, last[x], x}; last[x] = tot;}
                                            ^
0_0_34110688_27357.cpp: In function 'void add2(int, int)':
0_0_34110688_27357.cpp:28:46: error: 'edge' was not declared in this scope
 inline void add2(int x, int y) {e[++tot2] = (edge){y, last2[x], x}; last2[x] = tot2;}
                                              ^