View Compilation Error

0_0_38898192_32203.cpp:18:14: error: call of overloaded 'Edge()' is ambiguous
   18 | } E[maxn << 1], rE[maxn << 1];
      |              ^
0_0_38898192_32203.cpp:17:5: note: candidate: 'Edge::Edge(int, int)'
   17 |     Edge(int v = 0, int nex = 0) : v(v), nex(nex) {}
      |     ^~~~
0_0_38898192_32203.cpp:16:5: note: candidate: 'Edge::Edge()'
   16 |     Edge() {}
      |     ^~~~
0_0_38898192_32203.cpp:18:29: error: call of overloaded 'Edge()' is ambiguous
   18 | } E[maxn << 1], rE[maxn << 1];
      |                             ^
0_0_38898192_32203.cpp:17:5: note: candidate: 'Edge::Edge(int, int)'
   17 |     Edge(int v = 0, int nex = 0) : v(v), nex(nex) {}
      |     ^~~~
0_0_38898192_32203.cpp:16:5: note: candidate: 'Edge::Edge()'
   16 |     Edge() {}
      |     ^~~~