View Compilation Error

0_0_33377137_28825.cpp: In function 'int ok(int, int, int, int)':
0_0_33377137_28825.cpp:127:16: error: 'lcp' was not declared in this scope
   if(lcp(mid, p) >= r-l+1) ed = mid;
                ^
0_0_33377137_28825.cpp:135:16: error: 'lcp' was not declared in this scope
   if(lcp(mid, p) >= r-l+1) st = mid;
                ^
0_0_33377137_28825.cpp: In function 'int solve()':
0_0_33377137_28825.cpp:197:11: error: 'buildSA' was not declared in this scope
  buildSA(n);
           ^