View Compilation Error

0_0_15775036_11203.cpp: In function 'int find_kth(int)':
0_0_15775036_11203.cpp:47:20: error: 'maxn' was not declared in this scope
         if (ans >= maxn|| cnt + c[ans] >= k)
                    ^
0_0_15775036_11203.cpp:47:33: error: 'c' was not declared in this scope
         if (ans >= maxn|| cnt + c[ans] >= k)
                                 ^