View Compilation Error

0_0_19841800_32638.cpp: In function 'int main()':
0_0_19841800_32638.cpp:110:36: error: expected primary-expression before '<' token
             l_b[i+1] = r_b[i] = _x;<span style="white-space:pre">                </span>//合并时需要的信息
                                    ^
0_0_19841800_32638.cpp:110:37: error: 'span' was not declared in this scope
             l_b[i+1] = r_b[i] = _x;<span style="white-space:pre">                </span>//合并时需要的信息
                                     ^