#include <bits/stdc++.h>
using namespace std;

const int N = 5e5 + 5;

int n , a[N];

char s[N];

void solve () {
	cin >> s + 1; int n = strlen (s + 1); for (int i = 1;i <= n;i ++) {
		a[i] = s[i] - '0';
		if (i % 2 == 0 && a[i] < 2) a[i] ^= 1;
	} 
	int c[2] = {};
	for (int i = 1;i <= n;i ++) if (a[i] < 2) c[a[i]] ++;
	cout << max ((n & 1) * 1ll , abs (c[0] - c[1]) - (n - c[0] - c[1])) << '\n';
}

signed main () {
	ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
	int T; cin >> T; while (T --) solve ();
	return 0;
}

answer.code: In function ‘void solve()’:
answer.code:17:21: error: no matching function for call to ‘max(long long int, int)’
   17 |         cout << max ((n & 1) * 1ll , abs (c[0] - c[1]) - (n - c[0] - c[1])) << '\n';
      |                 ~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/13/algorithm:60,
                 from /usr/include/x86_64-linux-gnu/c++/13/bits/stdc++.h:51,
                 from answer.code:1:
/usr/include/c++/13/bits/stl_algobase.h:257:5: note: candidate: ‘template<class _Tp> constexpr const _Tp& std::max(const _Tp&, const _Tp&)’
  257 |     max(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/13/bits/stl_algobase.h:257:5: note:   template argument deduction/substitution failed:
answer.code:17:21: note:   deduced conflicting types for parameter ‘const _Tp’ (‘long long int’ and ‘int’)
   17 |         cout << max ((n & 1) * 1ll , abs (c[0] - c[1]) - (n - c[0] - c[1])) << '\n';
      |                 ~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/13/bits/stl_algobase.h:303:5: note: candidate: ‘template<class _Tp, class _Compare> constexpr const _Tp& std::max(const _Tp&, const _Tp&, _Compare)’
  303 |     max(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/13/bits/stl_algobase.h:303:5: note:   template argument deduction/substitution failed:
answer.code:17:21: note:   deduced conflicting types for parameter ‘const _Tp’ (‘long long int’ and ‘int’)
   17 |         cout << max ((n & 1) * 1ll , abs (c[0] - c[1]) - (n - c[0] - c[1])) << '\n';
      |                 ~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/13/algorithm:61:
/usr/include/c++/13/bits/stl_algo.h:5795:5: note: candidate: ‘template<class _Tp> constexpr _Tp std::max(initializer_list<_Tp>)’
 5795 |     max(initializer_list<_Tp> __l)
      |     ^~~
/usr/include/c++/13/bits/stl_algo.h:5795:5: note:   template argument deduction/substitution failed:
answer.code:17:21: note:   mismatched types ‘std::initializer_list<_Tp>’ and ‘long long int’
   17 |         cout << max ((n & 1) * 1ll , abs (c[0] - c[1]) - (n - c[0] - c[1])) << '\n';
      |                 ~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/13/bits/stl_algo.h:5805:5: note: candidate: ‘template<class _Tp, class _Compare> constexpr _Tp std::max(initializer_list<_Tp>, _Compare)’
 5805 |     max(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/usr/include/c++/13/bits/stl_algo.h:5805:5: note:   template argument deduction/substitution failed:
answer.code:17:21: note:   mismatched types ‘std::initializer_list<_Tp>’ and ‘long long int’
   17 |         cout << max ((n & 1) * 1ll , abs (c[0] - c[1]) - (n - c[0] - c[1])) << '\n';
      |                 ~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~