View Compilation Error

0_0_38331986_28607.cpp:8:5: error: expected initializer before 'while'
     while(tree[x]!=x) 
     ^
0_0_38331986_28607.cpp:10:5: error: expected unqualified-id before 'return'
     return x; 
     ^
0_0_38331986_28607.cpp:11:1: error: expected declaration before '}' token
 }
 ^