View Compilation Error

0_0_24843478_18142.cpp: In function 'void cdq(int, int)':
0_0_24843478_18142.cpp:57:30: error: lvalue required as left operand of assignment
         dp_tmp[i - l].real() = dp[i];
                              ^
0_0_24843478_18142.cpp:59:30: error: lvalue required as left operand of assignment
          a_tmp[i - l].real() = a[i - l];
                              ^