View Compilation Error

0_0_25929191_25851.cpp: In function 'int main()':
0_0_25929191_25851.cpp:32:10: error: 'init' was not declared in this scope
     init();
          ^
0_0_25929191_25851.cpp:37:29: error: 'max' was not declared in this scope
         LL l = max(n/2-30, 1), r = n/2+30;
                             ^
0_0_25929191_25851.cpp:38:20: error: 'r' was not declared in this scope
         while (l < r) {
                    ^
0_0_25929191_25851.cpp:40:17: error: 'idx' was not declared in this scope
             if (idx < n) l = mid + 1;
                 ^