View Compilation Error

0_0_37864159_7457.cpp:38:8: error: 'N' was not declared in this scope
 ll que[N];
        ^
0_0_37864159_7457.cpp: In function 'll cal()':
0_0_37864159_7457.cpp:43:5: error: 'que' was not declared in this scope
     que[t++]=-1;
     ^