View Compilation Error

0_0_22201360_11748.cpp: In function 'void spfa(int, int, int*)':
0_0_22201360_11748.cpp:41:5: error: expected primary-expression before '<' token
     <span class="hljs-built_in">queue<int> q;
     ^
0_0_22201360_11748.cpp:41:6: error: 'span' was not declared in this scope
     <span class="hljs-built_in">queue<int> q;
      ^
0_0_22201360_11748.cpp:45:5: error: 'q' was not declared in this scope
     q.push(S);
     ^