View Compilation Error

0_0_33377151_30007.cpp: In function 'int ok(int, int, int, int)':
0_0_33377151_30007.cpp:126:16: error: 'lcp' was not declared in this scope
   if(lcp(mid, p) >= r-l+1) ed = mid;
                ^
0_0_33377151_30007.cpp:134:16: error: 'lcp' was not declared in this scope
   if(lcp(mid, p) >= r-l+1) st = mid;
                ^
0_0_33377151_30007.cpp: At global scope:
0_0_33377151_30007.cpp:193:1: error: expected unqualified-id before '%' token
 %
 ^