View Compilation Error

0_0_36335509_9566.cpp: In function 'int query(int, int, int, int, int)':
0_0_36335509_9566.cpp:50:65: error: 'max' was not declared in this scope
   ans = max (ans, query(r, k, trie[now][0], sum + temp, bit - 1));
                                                                 ^
0_0_36335509_9566.cpp:55:64: error: 'max' was not declared in this scope
   ans = max(ans, query(r, k, trie[now][1], sum + temp, bit - 1));
                                                                ^
0_0_36335509_9566.cpp: In function 'int main()':
0_0_36335509_9566.cpp:65:11: error: 'read' was not declared in this scope
  T = read();
           ^
0_0_36335509_9566.cpp:98:18: error: 'printf' was not declared in this scope
    printf ("-1\n");
                  ^
0_0_36335509_9566.cpp:100:27: error: 'printf' was not declared in this scope
    printf ("%d %d\n", l, r);
                           ^