View Compilation Error

0_0_30277106_2902.cpp: In function 'int main()':
0_0_30277106_2902.cpp:41:46: error: invalid types 'int[int]' for array subscript
                 int last = nxt; nxt = nxt[nxt];
                                              ^
0_0_30277106_2902.cpp:47:32: error: invalid types 'int[int]' for array subscript
                 } else nxt[last] = nxt[nxt];
                                ^
0_0_30277106_2902.cpp:47:43: error: invalid types 'int[int]' for array subscript
                 } else nxt[last] = nxt[nxt];
                                           ^