Language: C++

#include<iostream>
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
#define rep(i,n) for(int i=0;i<n;i++)
using P = pair<int,int>;

/* 大文字を小文字に変換 */
char tolower(char c) {return (c + 0x20);}
/* 小文字を大文字に変換 */
char toupr(char c) {return (c - 0x20);}

// if('A'<=s[i] && s[i]<='Z') s[i] += 'a'-'A';

/*
string s = "abcdefg"
s.substr(4) "efg"
s.substr(0,3) "abc"
s.substr(2,4) "cdef"

// イテレータ要素のインデックス
distance(A.begin(), itr);
*/

int main()
{
    int n; cin >> n;
    string s; cin >> s;

    map<char, set<int> > m;
    rep(i,n) m[s[i]].insert(i);


    int q; cin >> q;
    rep(_,q){
        int que; cin >> que;
        if(que == 1){
            int i; char c; cin >> i >> c;
            --i;
            for(char moji='a'; moji<='z'; moji++){
                if(!m[moji].empty()) if(m[moji].count(i)) m[moji].erase(i);
            }
            m[c].insert(i);
        }else{
            int l, r; cin >> l >> r;
            --l, --r;
            int cnt = 0;
            for(char moji='a'; moji<='z'; moji++){
                if(!m[moji].empty()){
                    if(r >= lower_bound(m[moji].begin(), m[moji].end(), l)) cnt++;
                }
            }
            cout << cnt << endl;
        }
    }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:50:26: error: no match for 'operator>=' (operand types are 'int' and 'std::_Rb_tree_const_iterator<int>')
   50 |                     if(r >= lower_bound(m[moji].begin(), m[moji].end(), l)) cnt++;
      |                        ~ ^~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      |                        |               |
      |                        int             std::_Rb_tree_const_iterator<int>
In file included from /usr/include/c++/14/regex:68,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:181,
                 from a.cc:2:
/usr/include/c++/14/bits/regex.h:1165:5: note: candidate: 'template<class _BiIter> bool std::__cxx11::operator>=(const sub_match<_BiIter>&, const sub_match<_BiIter>&)'
 1165 |     operator>=(const sub_match<_BiIter>& __lhs, const sub_match<_BiIter>& __rhs)
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:1165:5: note:   template argument deduction/substitution failed:
a.cc:50:74: note:   mismatched types 'const std::__cxx11::sub_match<_BiIter>' and 'int'
   50 |                     if(r >= lower_bound(m[moji].begin(), m[moji].end(), l)) cnt++;
      |                                                                          ^
/usr/include/c++/14/bits/regex.h:1248:5: note: candidate: 'template<class _Bi_iter, class _Ch_traits, class _Ch_alloc> bool std::__cxx11::operator>=(__sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>&, const sub_match<_BiIter>&)'
 1248 |     operator>=(const __sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:1248:5: note:   template argument deduction/substitution failed:
a.cc:50:74: note:   mismatched types 'std::__cxx11::__sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>' and 'int'
   50 |                     if(r >= lower_bound(m[moji].begin(), m[moji].end(), l)) cnt++;
      |                                                                          ^
/usr/include/c++/14/bits/regex.h:1341:5: note: candidate: 'template<class _Bi_iter, class _Ch_traits, class _Ch_alloc> bool std::__cxx11::operator>=(const sub_match<_BiIter>&, __sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>&)'
 1341 |     operator>=(const sub_match<_Bi_iter>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:1341:5: note:   template argument deduction/substitution failed:
a.cc:50:74: note:   mismatched types 'const std::__cxx11::sub_match<_BiIter>' and 'int'
   50 |                     if(r >= lower_bound(m[moji].begin(), m[moji].end(), l)) cnt++;
      |                                                                          ^
/usr/include/c++/14/bits/regex.h:1415:5: note: candidate: 'template<class _Bi_iter> bool std::__cxx11::operator>=(const typename std::iterator_traits<_Iter>::value_type*, const sub_match<_BiIter>&)'
 1415 |     operator>=(typename iterator_traits<_Bi_iter>::value_type const* __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:1415:5: note:   template argument deduction/substitution failed:
a.cc:50:74: note:   'std::_Rb_tree_const_iterator<int>' is not derived from 'const std::__cxx11::sub_match<_BiIter>'
   50 |                     if(r >= lower_bound(m[moji].begin(), m[moji].end(), l)) cnt++;
      |                                                                          ^
/usr/include/c++/14/bits/regex.h:1509:5: note: candidate: 'template<class _Bi_iter> bool std::__cxx11::operator>=(const sub_match<_BiIter>&, const typename std::iterator_traits<_Iter>::value_type*)'
 1509 |     operator>=(const sub_match<_Bi_iter>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:1509:5: note:   template argument deduction/substitution failed:
a.cc:50:74: note:   mismatched types 'const std::__cxx11::sub_match<_BiIter>' and 'int'
   50 |                     if(r >= lower_bound(m[moji].begin(), m[moji].end(), l)) cnt++;
      |                                                                          ^
/usr/include/c++/14/bits/regex.h:1586:5: note: candidate: 'template<class _Bi_iter> bool std::__cxx11::operator>=(const typename std::iterator_traits<_Iter>::value_type&, const sub_match<_BiIter>&)'
 1586 |     operator>=(typename iterator_traits<_Bi_iter>::value_type const& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:1586:5: note:   template argument deduction/substitution failed:
a.cc:50:74: note:   'std::_Rb_tree_const_iterator<int>' is not derived from 'const std::__cxx11::sub_match<_BiIter>'
   50 |                     if(r >= lower_bound(m[moji].begin(), m[moji].end(), l)) cnt++;
      |                                                                          ^
/usr/include/c++/14/bits/regex.h:1686:5: note: candidate: 'template<class _Bi_iter> bool std::__cxx11::operator>=(const sub_match<_BiIter>&, const typename std::iterator_traits<_Iter>::value_type&)'
 1686 |     operator>=(const sub_match<_Bi_iter>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:1686:5: note:   template argument deduction/substitution failed:
a.cc:50:74: note:   mismatched types 'const std::__cxx11::sub_match<_BiIter>' and 'int'
   50 |                     if(r >= lower_bound(m[moji].begin(), m[moji].end(), l)) cnt++;
      |                                                                          ^
In file included from /usr/include/c++/14/string:48,
                 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/ostream:40,
                 from /usr/include/c++/14/iostream:41,
                 from a.cc:1:
/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:50:74: note:   mismatched types 'const std::reverse_iterator<_Iterator>' and 'int'
   50 |                     if(r >= lower_bound(m[moji].begin(), m[moji].end(), l)) cnt++;
      |                                                                          ^
/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:50:74: note:   mismatched types 'const std::reverse_iterator<_Iterator>' and 'int'
   50 |                     if(r >= lower_bound(m[moji].begin(), m[moji].end(), l)) cnt++;
      |                                                                          ^
/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:50:74: note:   mismatched types 'const std::move_iterator<_IteratorL>' and 'int'
   50 |                     if(r >= lower_bound(m[moji].begin(), m[moji].end(), l)) cnt++;
      |                                                                          ^
/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:50:74: note:   mismatched types 'const std::move_iterator<_IteratorL>' and 'int'
   50 |                     if(r >= lower_bound(m[moji].begin(), m[moji].end(), l)) cnt++;
      |                                                                          ^
In file included from /usr/include/c++/14/bits/stl_algobase.h:64,
                 from /usr/include/c++/14/string:51:
/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:50:74: note:   mismatched types 'const std::pair<_T1, _T2>' and 'int'
   50 |                     if(r >= lower_bound(m[moji].begin(), m[moji].end(), l)) cnt++;
      |                                                                          ^
In file included from /usr/include/c++/14/bits/basic_string.h:47,
                 from /usr/include/c++/14/string:54:
/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:50:74: note:   mismatched types 'std::basic_string_view<_CharT, _Traits>' and 'int'
   50 |                     if(r >= lower_bound(m[moji].begin(), m[moji].end(), l)) cnt++;
      |                                                                          ^
/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:50:74: note:   mismatched types 'std::basic_string_view<_