View Compilation Error

0_0_22008962_18658.cpp:38:20: error: 'c_size' was not declared in this scope
 bitset<maxn + 1> f[c_size], mask;
                    ^
0_0_22008962_18658.cpp: In function 'void NewNode(int, int)':
0_0_22008962_18658.cpp:44:29: error: 'f' was not declared in this scope
   x.dp = tree[fa].dp << 1 & f[c];
                             ^
0_0_22008962_18658.cpp: In function 'int main()':
0_0_22008962_18658.cpp:63:22: error: 'c_size' was not declared in this scope
   for(int i = 0; i < c_size; ++i) f[i].reset();
                      ^
0_0_22008962_18658.cpp:63:35: error: 'f' was not declared in this scope
   for(int i = 0; i < c_size; ++i) f[i].reset();
                                   ^
0_0_22008962_18658.cpp:81:6: error: 'f' was not declared in this scope
      f[i][n] = 1;
      ^
0_0_22008962_18658.cpp:84:34: error: 'f' was not declared in this scope
      if(tree[pt.fa].dp[n - 1] && f[pt.cc][n])
                                  ^