View Compilation Error

0_0_18200546_26629.cpp: In function 'int bfs()':
0_0_18200546_26629.cpp:32:2: error: 'queue' was not declared in this scope
  queue<int>q;
  ^
0_0_18200546_26629.cpp:32:8: error: expected primary-expression before 'int'
  queue<int>q;
        ^
0_0_18200546_26629.cpp:33:2: error: 'q' was not declared in this scope
  q.push(0);
  ^
0_0_18200546_26629.cpp:40:7: error: 'arc' was not declared in this scope
    if(arc[k][i] > 0 && d[i] == -1)
       ^