View Compilation Error

0_0_13153225_1430.cpp: In function 'void build(bool, int, int, int)':
0_0_13153225_1430.cpp:104:23: error: invalid use of member (did you forget the '&' ?)
    if (i == q[lth][_].size)insertit(_, th, q[rth][_][j++]);
                       ^
0_0_13153225_1430.cpp:105:28: error: invalid use of member (did you forget the '&' ?)
    else if (j == q[rth][_].size)insertit(_, th, q[lth][_][i++]);
                            ^