View Compilation Error

0_0_29396406_15950.cpp:14:5: error: 'maxn' was not declared in this scope
 } q[maxn];
     ^
0_0_29396406_15950.cpp: In function 'int main()':
0_0_29396406_15950.cpp:76:23: error: 'q' was not declared in this scope
         scanf("%d%d",&q[i].x,&q[i].y);
                       ^
0_0_29396406_15950.cpp:79:10: error: 'q' was not declared in this scope
     sort(q,q+m);
          ^