View Compilation Error

0_0_33377111_21293.cpp: In function 'int ok(int, int, int, int)':
0_0_33377111_21293.cpp:126:16: error: 'lcp' was not declared in this scope
   if(lcp(mid, p) >= r-l+1) ed = mid;
                ^
0_0_33377111_21293.cpp:134:16: error: 'lcp' was not declared in this scope
   if(lcp(mid, p) >= r-l+1) st = mid;
                ^
0_0_33377111_21293.cpp: In function 'int sol()':
0_0_33377111_21293.cpp:171:17: error: 'build' was not declared in this scope
  build(1, 1, n+1);
                 ^
0_0_33377111_21293.cpp: In function 'int solve()':
0_0_33377111_21293.cpp:196:11: error: 'buildSA' was not declared in this scope
  buildSA(n);
           ^