View Compilation Error

0_0_30092707_10881.cpp: In function 'int main()':
0_0_30092707_10881.cpp:21:68: error: expected primary-expression before ';' token
     for(int k=fi; k<=la; k++)a[k]==o[ll]?ll=!ll,sum++,d=max(d,sum):;
                                                                    ^