View Compilation Error

0_0_39583542_1941.cpp: In function 'int main()':
0_0_39583542_1941.cpp:20:21: error: 'ne' was not declared in this scope
   20 |                 if(!ne[n]){
      |                     ^~
0_0_39583542_1941.cpp:20:24: error: 'n' was not declared in this scope
   20 |                 if(!ne[n]){
      |                        ^
0_0_39583542_1941.cpp:29:40: error: 'n' was not declared in this scope
   29 |                         printf("%d\n", n - ne[n] - n % (n - ne[n]));
      |                                        ^
0_0_39583542_1941.cpp:29:44: error: 'ne' was not declared in this scope
   29 |                         printf("%d\n", n - ne[n] - n % (n - ne[n]));
      |                                            ^~