View Compilation Error

0_0_24706754_13924.cpp: In function 'int find(int)':
0_0_24706754_13924.cpp:31:21: error: expected ';' before ':' token
     return x==pre[x]:x?pre[x]=find(pre[x]);
                     ^
0_0_24706754_13924.cpp:31:21: error: expected primary-expression before ':' token