View Compilation Error

0_0_38588662_5726.cpp:5:13: error: conflicting declaration 'int a [1000010]'
 int f[N],a[N];
             ^
0_0_38588662_5726.cpp:4:23: note: previous declaration as 'int a'
 int n,m,t,k,q,cnt,tot,a,b;
                       ^