View Compilation Error

0_0_33105634_12354.cpp: In function 'void build(int, int, int)':
0_0_33105634_12354.cpp:37:12: error: expected primary-expression at end of input
   lenn[rt] = 
            ^
0_0_33105634_12354.cpp:37:12: error: expected '}' at end of input
0_0_33105634_12354.cpp:37:12: error: expected '}' at end of input