View Compilation Error

0_0_21188500_20041.cpp: In function 'void init()':
0_0_21188500_20041.cpp:55:31: error: expected ')' before 'tree'
     memset(tree,0,sizeof((n+2)tree[0]));
                               ^
0_0_21188500_20041.cpp:55:40: error: expected ')' before ';' token
     memset(tree,0,sizeof((n+2)tree[0]));
                                        ^
0_0_21188500_20041.cpp:56:30: error: expected ')' before 'ans'
     memset(ans,0,sizeof((n+2)ans[0]));
                              ^
0_0_21188500_20041.cpp:56:38: error: expected ')' before ';' token
     memset(ans,0,sizeof((n+2)ans[0]));
                                      ^