View Compilation Error

0_0_17282731_10082.c:4:6: error: variably modified 'ans' at file scope
 char ans[N];
      ^
0_0_17282731_10082.c:5:6: error: variably modified 'bns' at file scope
 char bns[N];
      ^
0_0_17282731_10082.c:6:5: error: variably modified 'next' at file scope
 int next[N];
     ^