View Compilation Error

0_0_38155240_25830.cpp: In function 'void bfs(int)':
0_0_38155240_25830.cpp:25:14: error: 'class std::queue<int>' has no member named 'dlte'
     while (q.dlte()) {
              ^
0_0_38155240_25830.cpp: At global scope:
0_0_38155240_25830.cpp:52:10: error: redefinition of 'int dlt [20077]'
 int dlt[N];
          ^
0_0_38155240_25830.cpp:13:5: note: 'int dlt [20077]' previously declared here
 int dlt[N]; //差分数组
     ^