View Compilation Error

0_0_33377105_32369.cpp: In function 'int ok(int, int, int, int)':
0_0_33377105_32369.cpp:126:16: error: 'lcp' was not declared in this scope
   if(lcp(mid, p) >= r-l+1) ed = mid;
                ^
0_0_33377105_32369.cpp:134:16: error: 'lcp' was not declared in this scope
   if(lcp(mid, p) >= r-l+1) st = mid;
                ^
0_0_33377105_32369.cpp: In function 'int sol()':
0_0_33377105_32369.cpp:171:18: error: expected '}' at end of input
  build(1, 1, n+1);

                  ^