View Compilation Error

0_0_33225928_29182.cpp:36:42: error: expected '}' at end of input
         build(rson(rt), mid(l, r) + 1, r);
                                          ^
0_0_33225928_29182.cpp: In member function 'void tree_1::build(int, int, int)':
0_0_33225928_29182.cpp:36:42: error: expected '}' at end of input
0_0_33225928_29182.cpp: At global scope:
0_0_33225928_29182.cpp:36:42: error: expected unqualified-id at end of input