View Compilation Error

0_0_37716808_22284.cpp: In function 'void slv()':
0_0_37716808_22284.cpp:44:8: error: expected unqualified-id before '[' token
   auto [x, y, len] = e[i];
        ^
0_0_37716808_22284.cpp:46:11: error: 'len' was not declared in this scope
   if (!st[len]) res += (p[x] ^ p[y]).count();
           ^
0_0_37716808_22284.cpp:46:28: error: invalid types 'std::bitset<2010ull> [2010][int [2010]]' for array subscript
   if (!st[len]) res += (p[x] ^ p[y]).count();
                            ^
0_0_37716808_22284.cpp:46:35: error: invalid types 'std::bitset<2010ull> [2010][int [2010]]' for array subscript
   if (!st[len]) res += (p[x] ^ p[y]).count();
                                   ^
0_0_37716808_22284.cpp:47:6: error: invalid types 'std::bitset<2010ull> [2010][int [2010]]' for array subscript
   p[x][y] = 1;
      ^
0_0_37716808_22284.cpp:48:6: error: invalid types 'std::bitset<2010ull> [2010][int [2010]]' for array subscript
   p[y][x] = 1;
      ^