View Compilation Error

0_0_39663027_2237.cpp: In function 'void solve()':
0_0_39663027_2237.cpp:36:36: error: 'graph' was not declared in this scope; did you mean 'isgraph'?
   36 |                 if (!visited[i] && graph[i].size() > 0) {
      |                                    ^~~~~
      |                                    isgraph
0_0_39663027_2237.cpp:48:48: error: 'graph' was not declared in this scope; did you mean 'isgraph'?
   48 |                 if (((degree[i] + 1)/2) & 1 && graph[i].size() > 0) ans ^= a[i];
      |                                                ^~~~~
      |                                                isgraph
0_0_39663027_2237.cpp:53:56: error: 'graph' was not declared in this scope; did you mean 'isgraph'?
   53 |                         if (((degree[i] + 1)/2) & 1 && graph[i].size() > 0) ans = max(ans, ans ^ a[i]);
      |                                                        ^~~~~
      |                                                        isgraph