View Compilation Error

0_0_32288678_13753.cpp: In function 'void build(int, int, int)':
0_0_32288678_13753.cpp:54:39: error: expected ')' before ']' token
  d[c].len = max(d[c *2].len, d[(c *2+1].len);
                                       ^
0_0_32288678_13753.cpp:54:45: error: expected ']' before ';' token
  d[c].len = max(d[c *2].len, d[(c *2+1].len);
                                             ^
0_0_32288678_13753.cpp:54:45: error: expected ')' before ';' token