View Compilation Error

0_0_18402393_14522.cpp: In function 'void init()':
0_0_18402393_14522.cpp:9:36: error: 'a' was not declared in this scope
     for (int i = 1; i < 1005; i++) a[i] = 1;
                                    ^
0_0_18402393_14522.cpp:16:25: error: expected primary-expression before '=' token
                 dp[i] + = dp[j];
                         ^
0_0_18402393_14522.cpp:17:25: error: expected primary-expression before '=' token
                 dp[i] % =mod;
                         ^