foo.cc:10:18: warning: suggest parentheses around '+' inside '<<' [-Wparentheses]
   10 | } tree[MAXN << 2 + 1];
      |                ~~^~~
foo.cc: In function 'int main()':
foo.cc:99:34: error: no matching function for call to 'max(int&, long long int)'
   99 |     ans = max(ans, query(i, i, 1));
      |                                  ^
In file included from /usr/include/c++/9/bits/char_traits.h:39,
                 from /usr/include/c++/9/ios:40,
                 from /usr/include/c++/9/istream:38,
                 from /usr/include/c++/9/sstream:38,
                 from /usr/include/c++/9/complex:45,
                 from /usr/include/c++/9/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:54,
                 from foo.cc:3:
/usr/include/c++/9/bits/stl_algobase.h:222:5: note: candidate: 'template<class _Tp> const _Tp& std::max(const _Tp&, const _Tp&)'
  222 |     max(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/9/bits/stl_algobase.h:222:5: note:   template argument deduction/substitution failed:
foo.cc:99:34: note:   deduced conflicting types for parameter 'const _Tp' ('int' and 'long long int')
   99 |     ans = max(ans, query(i, i, 1));
      |                                  ^
In file included from /usr/include/c++/9/bits/char_traits.h:39,
                 from /usr/include/c++/9/ios:40,
                 from /usr/include/c++/9/istream:38,
                 from /usr/include/c++/9/sstream:38,
                 from /usr/include/c++/9/complex:45,
                 from /usr/include/c++/9/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:54,
                 from foo.cc:3:
/usr/include/c++/9/bits/stl_algobase.h:268:5: note: candidate: 'template<class _Tp, class _Compare> const _Tp& std::max(const _Tp&, const _Tp&, _Compare)'
  268 |     max(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/9/bits/stl_algobase.h:268:5: note:   template argument deduction/substitution failed:
foo.cc:99:34: note:   deduced conflicting types for parameter 'const _Tp' ('int' and 'long long int')
   99 |     ans = max(ans, query(i, i, 1));
      |                                  ^
In file included from /usr/include/c++/9/algorithm:62,
                 from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:65,
                 from foo.cc:3:
/usr/include/c++/9/bits/stl_algo.h:3462:5: note: candidate: 'template<class _Tp> _Tp std::max(std::initializer_list<_Tp>)'
 3462 |     max(initializer_list<_Tp> __l)
      |     ^~~
/usr/include/c++/9/bits/stl_algo.h:3462:5: note:   template argument deduction/substitution failed:
foo.cc:99:34: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
   99 |     ans = max(ans, query(i, i, 1));
      |                                  ^
In file included from /usr/include/c++/9/algorithm:62,
                 from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:65,
                 from foo.cc:3:
/usr/include/c++/9/bits/stl_algo.h:3468:5: note: candidate: 'template<class _Tp, class _Compare> _Tp std::max(std::initializer_list<_Tp>, _Compare)'
 3468 |     max(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/usr/include/c++/9/bits/stl_algo.h:3468:5: note:   template argument deduction/substitution failed:
foo.cc:99:34: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
   99 |     ans = max(ans, query(i, i, 1));
      |                                  ^
foo.cc:110:34: error: no matching function for call to 'min(int&, long long int)'
  110 |     ans = min(ans, query(i, i, 1));
      |                                  ^
In file included from /usr/include/c++/9/bits/char_traits.h:39,
                 from /usr/include/c++/9/ios:40,
                 from /usr/include/c++/9/istream:38,
                 from /usr/include/c++/9/sstream:38,
                 from /usr/include/c++/9/complex:45,
                 from /usr/include/c++/9/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:54,
                 from foo.cc:3:
/usr/include/c++/9/bits/stl_algobase.h:198:5: note: candidate: 'template<class _Tp> const _Tp& std::min(const _Tp&, const _Tp&)'
  198 |     min(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/9/bits/stl_algobase.h:198:5: note:   template argument deduction/substitution failed:
foo.cc:110:34: note:   deduced conflicting types for parameter 'const _Tp' ('int' and 'long long int')
  110 |     ans = min(ans, query(i, i, 1));
      |                                  ^
In file included from /usr/include/c++/9/bits/char_traits.h:39,
                 from /usr/include/c++/9/ios:40,
                 from /usr/include/c++/9/istream:38,
                 from /usr/include/c++/9/sstream:38,
                 from /usr/include/c++/9/complex:45,
                 from /usr/include/c++/9/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:54,
                 from foo.cc:3:
/usr/include/c++/9/bits/stl_algobase.h:246:5: note: candidate: 'template<class _Tp, class _Compare> const _Tp& std::min(const _Tp&, const _Tp&, _Compare)'
  246 |     min(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/9/bits/stl_algobase.h:246:5: note:   template argument deduction/substitution failed:
foo.cc:110:34: note:   deduced conflicting types for parameter 'const _Tp' ('int' and 'long long int')
  110 |     ans = min(ans, query(i, i, 1));
      |                                  ^
In file included from /usr/include/c++/9/algorithm:62,
                 from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:65,
                 from foo.cc:3:
/usr/include/c++/9/bits/stl_algo.h:3450:5: note: candidate: 'template<class _Tp> _Tp std::min(std::initializer_list<_Tp>)'
 3450 |     min(initializer_list<_Tp> __l)
      |     ^~~
/usr/include/c++/9/bits/stl_algo.h:3450:5: note:   template argument deduction/substitution failed:
foo.cc:110:34: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
  110 |     ans = min(ans, query(i, i, 1));
      |                                  ^
In file included from /usr/include/c++/9/algorithm:62,
                 from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:65,
                 from foo.cc:3:
/usr/include/c++/9/bits/stl_algo.h:3456:5: note: candidate: 'template<class _Tp, class _Compare> _Tp std::min(std::initializer_list<_Tp>, _Compare)'
 3456 |     min(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/usr/include/c++/9/bits/stl_algo.h:3456:5: note:   template argument deduction/substitution failed:
foo.cc:110:34: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
  110 |     ans = min(ans, query(i, i, 1));
      |                                  ^
foo.cc:128:22: error: too few arguments to function 'long long int query(int, int, int)'
  128 |    cout << query(1, x) + query(y, n) << endl;
      |                      ^
foo.cc:52:11: note: declared here
   52 | long long query(int l, int r, int k){
      |           ^~~~~
foo.cc:128:36: error: too few arguments to function 'long long int query(int, int, int)'
  128 |    cout << query(1, x) + query(y, n) << endl;
      |                                    ^
foo.cc:52:11: note: declared here
   52 | long long query(int l, int r, int k){
      |           ^~~~~

[Hydro](https://hydro.ac)提供评测服务