View Compilation Error

0_0_21442814_6255.cpp:8:10: error: conflicting declaration 'int a [100]'
 int a[100], b[100];
          ^
0_0_21442814_6255.cpp:7:17: note: previous declaration as 'int a [512345]'
 int T, n, K, i, a[MAX], pos[MAX], pre[MAX], nxt[MAX];
                 ^