View Compilation Error

0_0_28480279_5230.cpp: In function 'int find_rt(node&)':
0_0_28480279_5230.cpp:20:49: error: expected primary-expression at end of input
    int span = A.c - A.b, step = (A.b - A.a - 1) /
                                                 ^
0_0_28480279_5230.cpp:20:49: error: expected ',' or ';' at end of input
0_0_28480279_5230.cpp:20:49: error: expected '}' at end of input
0_0_28480279_5230.cpp:20:49: error: expected '}' at end of input
0_0_28480279_5230.cpp:20:49: error: expected '}' at end of input