Help me in solving ABCC3 problem

help
,
1

My issue

1
26
aabccbbbccaacacccbbaacbacb
What shall be the answer for this test case?

My code

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

// Aliases
using ll = long long;
using lld = long double;
using ull = unsigned long long;

// Constants
const lld pi = 3.141592653589793238;
const ll INF = LONG_LONG_MAX;
const ll mod = 1000000007;

#define debug(x) cerr << #x << " " << x << endl;

#define cy cout << "YES\n"
#define cn cout << "NO\n"

void testcase()
{
    int n;
    cin >> n;
    string s;
    cin >> s;
    int a = 0;
    int b = 0;
    int c = 0;
    int count = 0;
    for (int i = 0; i < n; i++)
    {
        if (s[i] == 'a')
            a++;
        if (s[i] == 'b' && a > 0)
            b=a;
        else if (s[i] == 'c' && b > 0 && a > 0)
        {
            count++;
            a--;
            b--;
        }
    }
    cout << count << '\n';
}

int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

    int t = 1;
    cin >> t;
    while (t--)
    {
        testcase();
    }
    return 0;
}

Problem Link: ABC Conjecture 3 Practice Coding Problem - CodeChef

2

4 will be answer -

a a bccbbbccaacacccbbaa c ba c b