Language: C++

#include <bits/stdc++.h>

using namespace std;

int main() {
    string S;
    cin >> S;
    int N = S.length();
    // cout << N << endl;
    vector<int> a(N);
    for (int i = 0; i < N; ++i) {
        int n = S[i] - '0';
        a[i] = n;
    }
    for (int j = 0; j < a.size(); ++j) {
        cout << a[j];
    }
    int ans = 0;
    int temp;
    bool flag = true;
    while (flag) {
        bool f = false;
//        for (int i = 0; i < a.size(); ++i) {
        for (int i = 0; i < a.size(); ++i) {
            int n = a[i];
            if (temp == 0 && n == 1) {
                //a.erase(a.begin() + i - 1, a.begin() + i);
                a.erase(i - 1,2);
//                for (int j = 0; j < a.size(); ++j) {
//                    cout << a[j];
//                }
                ans += 2;
                f = true;
                break;
            } else if (temp == 1 && n == 0) {
                a.erase(i - 1, 2);
//                a.erase(a.begin() + i - 1, a.begin() + i);
                ans += 2;
                f = true;
                break;
            }
            temp = n;
        }
        if (!f) {
            break;
        }
    }
    cout << ans << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:28:24: error: no matching function for call to 'std::vector<int>::erase(int, int)'
   28 |                 a.erase(i - 1,2);
      |                 ~~~~~~~^~~~~~~~~
In file included from /usr/include/c++/14/vector:66,
                 from /usr/include/c++/14/functional:64,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:53,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_vector.h:1536:7: note: candidate: 'std::vector<_Tp, _Alloc>::iterator std::vector<_Tp, _Alloc>::erase(const_iterator) [with _Tp = int; _Alloc = std::allocator<int>; iterator = std::vector<int>::iterator; const_iterator = std::vector<int>::const_iterator]'
 1536 |       erase(const_iterator __position)
      |       ^~~~~
/usr/include/c++/14/bits/stl_vector.h:1536:7: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/14/bits/stl_vector.h:1564:7: note: candidate: 'std::vector<_Tp, _Alloc>::iterator std::vector<_Tp, _Alloc>::erase(const_iterator, const_iterator) [with _Tp = int; _Alloc = std::allocator<int>; iterator = std::vector<int>::iterator; const_iterator = std::vector<int>::const_iterator]'
 1564 |       erase(const_iterator __first, const_iterator __last)
      |       ^~~~~
/usr/include/c++/14/bits/stl_vector.h:1564:28: note:   no known conversion for argument 1 from 'int' to 'std::vector<int>::const_iterator'
 1564 |       erase(const_iterator __first, const_iterator __last)
      |             ~~~~~~~~~~~~~~~^~~~~~~
a.cc:36:24: error: no matching function for call to 'std::vector<int>::erase(int, int)'
   36 |                 a.erase(i - 1, 2);
      |                 ~~~~~~~^~~~~~~~~~
/usr/include/c++/14/bits/stl_vector.h:1536:7: note: candidate: 'std::vector<_Tp, _Alloc>::iterator std::vector<_Tp, _Alloc>::erase(const_iterator) [with _Tp = int; _Alloc = std::allocator<int>; iterator = std::vector<int>::iterator; const_iterator = std::vector<int>::const_iterator]'
 1536 |       erase(const_iterator __position)
      |       ^~~~~
/usr/include/c++/14/bits/stl_vector.h:1536:7: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/14/bits/stl_vector.h:1564:7: note: candidate: 'std::vector<_Tp, _Alloc>::iterator std::vector<_Tp, _Alloc>::erase(const_iterator, const_iterator) [with _Tp = int; _Alloc = std::allocator<int>; iterator = std::vector<int>::iterator; const_iterator = std::vector<int>::const_iterator]'
 1564 |       erase(const_iterator __first, const_iterator __last)
      |       ^~~~~
/usr/include/c++/14/bits/stl_vector.h:1564:28: note:   no known conversion for argument 1 from 'int' to 'std::vector<int>::const_iterator'
 1564 |       erase(const_iterator __first, const_iterator __last)
      |             ~~~~~~~~~~~~~~~^~~~~~~