View Compilation Error

0_0_29329546_11684.cpp:7:1: error: expected unqualified-id before 'unsigned'
 unsigned int pre[65535];
 ^
0_0_29329546_11684.cpp: In function 'bool bfs()':
0_0_29329546_11684.cpp:13:9: error: 'pre' was not declared in this scope
  memset(pre, 0, sizeof(pre));
         ^
0_0_29329546_11684.cpp: In function 'int maxflow()':
0_0_29329546_11684.cpp:44:31: error: 'pre' was not declared in this scope
   for (int i = e; i != s; i = pre[i])
                               ^
0_0_29329546_11684.cpp:47:31: error: 'pre' was not declared in this scope
   for (int i = e; i != s; i = pre[i])
                               ^