Language: C++

#include <cmath>
#include <functional>
#include <fstream>
#include <iostream>
#include <vector>
#include <algorithm>
#include <string>
#include <set>
#include <map>
#include <list>
#include <time.h>
#include <math.h>
#include <random>
#include <deque>
#include <queue>
#include <cassert>
#include <unordered_map>
#include <unordered_set>
#include <iomanip>
#include <bitset>
#include <sstream>
#include <chrono>
#include <cstring>
 
using namespace std;
 
typedef long long ll;

#define FOR(i, a) for (int i = 0; i < a; i++)
#define FOR(i, a, k) for (int i = a; i < a; i++)
#define PB push_back
#define ff first
#define se second
#define all(a) begin(a),end(a)
typedef vector<int> VI;
const ll mod = 1e9 + 7;
void solve() {
    string s;
    cin >> s;
    if (s >= 'A' && s <= 'Z') {
        cout << "A";
    } else {
        cout << "a";
    }
    return;
}

// int Depth(BitTree T) {
//     int l_depth = 0, r_depth = 0;
//     // if (root == NULL) return 0;
//     else {
//         l_depth = Depth(T.lrchild) + 1;
//         r_depth = Depth(T.rchild) + 1;
//     }
//     return l_depth > r_depth ? l_depth : r_depth;
// }

int main() {
    solve();
    return 0;
}


Compiler output:
a.cc:30:9: warning: "FOR" redefined
   30 | #define FOR(i, a, k) for (int i = a; i < a; i++)
      |         ^~~
a.cc:29:9: note: this is the location of the previous definition
   29 | #define FOR(i, a) for (int i = 0; i < a; i++)
      |         ^~~
a.cc: In function 'void solve()':
a.cc:40:11: error: no match for 'operator>=' (operand types are 'std::string' {aka 'std::__cxx11::basic_string<char>'} and 'char')
   40 |     if (s >= 'A' && s <= 'Z') {
      |         ~ ^~ ~~~
      |         |    |
      |         |    char
      |         std::string {aka std::__cxx11::basic_string<char>}
In file included from /usr/include/c++/14/bits/stl_algobase.h:64,
                 from /usr/include/c++/14/bits/specfun.h:43,
                 from /usr/include/c++/14/cmath:3906,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_pair.h:1070:5: note: candidate: 'template<class _T1, class _T2> constexpr bool std::operator>=(const pair<_T1, _T2>&, const pair<_T1, _T2>&)'
 1070 |     operator>=(const pair<_T1, _T2>& __x, const pair<_T1, _T2>& __y)
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_pair.h:1070:5: note:   template argument deduction/substitution failed:
a.cc:40:14: note:   'std::string' {aka 'std::__cxx11::basic_string<char>'} is not derived from 'const std::pair<_T1, _T2>'
   40 |     if (s >= 'A' && s <= 'Z') {
      |              ^~~
In file included from /usr/include/c++/14/bits/stl_algobase.h:67:
/usr/include/c++/14/bits/stl_iterator.h:476:5: note: candidate: 'template<class _Iterator> constexpr bool std::operator>=(const reverse_iterator<_Iterator>&, const reverse_iterator<_Iterator>&)'
  476 |     operator>=(const reverse_iterator<_Iterator>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:476:5: note:   template argument deduction/substitution failed:
a.cc:40:14: note:   'std::string' {aka 'std::__cxx11::basic_string<char>'} is not derived from 'const std::reverse_iterator<_Iterator>'
   40 |     if (s >= 'A' && s <= 'Z') {
      |              ^~~
/usr/include/c++/14/bits/stl_iterator.h:520:5: note: candidate: 'template<class _IteratorL, class _IteratorR> constexpr bool std::operator>=(const reverse_iterator<_Iterator>&, const reverse_iterator<_IteratorR>&)'
  520 |     operator>=(const reverse_iterator<_IteratorL>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:520:5: note:   template argument deduction/substitution failed:
a.cc:40:14: note:   'std::string' {aka 'std::__cxx11::basic_string<char>'} is not derived from 'const std::reverse_iterator<_Iterator>'
   40 |     if (s >= 'A' && s <= 'Z') {
      |              ^~~
/usr/include/c++/14/bits/stl_iterator.h:1724:5: note: candidate: 'template<class _IteratorL, class _IteratorR> constexpr bool std::operator>=(const move_iterator<_IteratorL>&, const move_iterator<_IteratorR>&)'
 1724 |     operator>=(const move_iterator<_IteratorL>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:1724:5: note:   template argument deduction/substitution failed:
a.cc:40:14: note:   'std::string' {aka 'std::__cxx11::basic_string<char>'} is not derived from 'const std::move_iterator<_IteratorL>'
   40 |     if (s >= 'A' && s <= 'Z') {
      |              ^~~
/usr/include/c++/14/bits/stl_iterator.h:1781:5: note: candidate: 'template<class _Iterator> constexpr bool std::operator>=(const move_iterator<_IteratorL>&, const move_iterator<_IteratorL>&)'
 1781 |     operator>=(const move_iterator<_Iterator>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:1781:5: note:   template argument deduction/substitution failed:
a.cc:40:14: note:   'std::string' {aka 'std::__cxx11::basic_string<char>'} is not derived from 'const std::move_iterator<_IteratorL>'
   40 |     if (s >= 'A' && s <= 'Z') {
      |              ^~~
In file included from /usr/include/c++/14/functional:53,
                 from a.cc:2:
/usr/include/c++/14/tuple:2631:5: note: candidate: 'template<class ... _TElements, class ... _UElements> constexpr bool std::operator>=(const tuple<_UTypes ...>&, const tuple<_Elements ...>&)'
 2631 |     operator>=(const tuple<_TElements...>& __t,
      |     ^~~~~~~~
/usr/include/c++/14/tuple:2631:5: note:   template argument deduction/substitution failed:
a.cc:40:14: note:   'std::string' {aka 'std::__cxx11::basic_string<char>'} is not derived from 'const std::tuple<_UTypes ...>'
   40 |     if (s >= 'A' && s <= 'Z') {
      |              ^~~
In file included from /usr/include/c++/14/vector:66,
                 from /usr/include/c++/14/functional:64:
/usr/include/c++/14/bits/stl_vector.h:2114:5: note: candidate: 'template<class _Tp, class _Alloc> bool std::operator>=(const vector<_Tp, _Alloc>&, const vector<_Tp, _Alloc>&)'
 2114 |     operator>=(const vector<_Tp, _Alloc>& __x, const vector<_Tp, _Alloc>& __y)
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_vector.h:2114:5: note:   template argument deduction/substitution failed:
a.cc:40:14: note:   'std::string' {aka 'std::__cxx11::basic_string<char>'} is not derived from 'const std::vector<_Tp, _Alloc>'
   40 |     if (s >= 'A' && s <= 'Z') {
      |              ^~~
In file included from /usr/include/c++/14/functional:65:
/usr/include/c++/14/array:363:5: note: candidate: 'template<class _Tp, long unsigned int _Nm> bool std::operator>=(const array<_Tp, _Nm>&, const array<_Tp, _Nm>&)'
  363 |     operator>=(const array<_Tp, _Nm>& __one, const array<_Tp, _Nm>& __two)
      |     ^~~~~~~~
/usr/include/c++/14/array:363:5: note:   template argument deduction/substitution failed:
a.cc:40:14: note:   'std::string' {aka 'std::__cxx11::basic_string<char>'} is not derived from 'const std::array<_Tp, _Nm>'
   40 |     if (s >= 'A' && s <= 'Z') {
      |              ^~~
In file included from /usr/include/c++/14/bits/basic_string.h:47,
                 from /usr/include/c++/14/string:54,
                 from /usr/include/c++/14/bits/locale_classes.h:40,
                 from /usr/include/c++/14/bits/ios_base.h:41,
                 from /usr/include/c++/14/ios:44,
                 from /usr/include/c++/14/istream:40,
                 from /usr/include/c++/14/fstream:40,
                 from a.cc:3:
/usr/include/c++/14/string_view:739:5: note: candidate: 'template<class _CharT, class _Traits> constexpr bool std::operator>=(basic_string_view<_CharT, _Traits>, basic_string_view<_CharT, _Traits>)'
  739 |     operator>=(basic_string_view<_CharT, _Traits> __x,
      |     ^~~~~~~~
/usr/include/c++/14/string_view:739:5: note:   template argument deduction/substitution failed:
a.cc:40:14: note:   'std::__cxx11::basic_string<char>' is not derived from 'std::basic_string_view<_CharT, _Traits>'
   40 |     if (s >= 'A' && s <= 'Z') {
      |              ^~~
/usr/include/c++/14/string_view:746:5: note: candidate: 'template<class _CharT, class _Traits> constexpr bool std::operator>=(basic_string_view<_CharT, _Traits>, __type_identity_t<basic_string_view<_CharT, _Traits> >)'
  746 |     operator>=(basic_string_view<_CharT, _Traits> __x,
      |     ^~~~~~~~
/usr/include/c++/14/string_view:746:5: note:   template argument deduction/substitution failed:
a.cc:40:14: note:   'std::__cxx11::basic_string<char>' is not derived from 'std::basic_string_view<_CharT, _Traits>'
   40 |     if (s >= 'A' && s <= 'Z') {
      |              ^~~
/usr/include/c++/14/string_view:754:5: note: candidate: 'template<class _CharT, class _Traits> constexpr bool std::operator>=(__type_identity_t<basic_string_view<_CharT, _Traits> >, basic_string_view<_CharT, _Traits>)'
  754 |     operator>=(__type_identity_t<basic_string_view<_CharT, _Traits>> __x,
      |     ^~~~~~~~
/usr/include/c++/14/string_view:754:5: note:   template argument deduction/substitution failed:
a.cc:40:14: note:   mismatched types 'std::basic_string_view<_CharT, _Traits>' and 'char'
   40 |     if (s >= 'A' && s <= 'Z') {
      |              ^~~
/usr/include/c++/14/bits/basic_string.h:3997:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> bool std::operator>=(const __cxx11::basic_string<_CharT, _Traits, _Allocator>&, const __cxx11::basic_string<_CharT, _Traits, _Allocator>&)'
 3997 |     operator>=(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3997:5: note:   template argument deduction/substitution failed:
a.cc:40:14: note:   mismatched types 'const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>' and 'char'
   40 |     if (s >= 'A' && s <= 'Z') {
      |              ^~~
/usr/include/c++/14/bits/basic_string.h:4011:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> bool std::operator>=(const __cxx11::basic_string<_CharT, _Traits, _Allocator>&, const _CharT*)'
 4011 |     operator>=(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:4011:5: note:   template argument deduction/substitution failed:
a.cc:40:14: note:   mismatched types 'const _CharT*' and 'char'
   40 |     if (s >= 'A' && s <= 'Z') {
      |              ^~~
/usr/include/c++/14/bits/basic_string.h:4024:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> bool std::operator>=(const _CharT*, const __cxx11::basic_string<_CharT, _Traits, _Allocator>&)'
 4024 |     operator>=(const _CharT* __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:4024:5: note:   template argument deduction/substitution failed:
a.cc:40:14: note:   mismatched types 'const _CharT*' and 'std::__cxx11::basic_string<char>'
   40 |     if (s >= 'A' && s <= 'Z') {
      |              ^~~
In file included from /usr/include/c++/14/set:63,
                 from a.cc:8:
/usr/include/c++/14/bits/stl_set.h:1053:5: note: candidate: 'template<class _Key, class _Compare, class _Alloc> bool std::operator>=(const set<_Key, _Compare, _Allocator>&, const set<_Key, _Compare, _Allocator>&)'
 1053 |     operator>=(const set<_Key, _Compare, _Alloc>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_set.h:1053:5: note:   template argument deduction/substitution failed:
a.cc:40:14: note:   'std::string' {aka 'std::__cxx11::basic_string<char>'} is not derived from 'const std::set<_Key, _Compare, _Allocator>'
   40 |     if (s >=