Finding 3-Digit Even Numbers

<-E 2094> Finding 3-Digit Even Numbers

class Solution {
public:
    vector<int> findEvenNumbers(vector<int>& digits) {
        int count[10] = {0};
        vector<int> res;

        for(int d : digits)
            count[d]++;
        for(int i = 1; i < 10; i++) {
            if(count[i] == 0)
                continue;
            count[i]--;
            for(int j = 0; j < 10; j++) {
                if(count[j] == 0)
                    continue;
                count[j]--;
                for(int k = 0; k < 10; k += 2) {
                    if(count[k] == 0)
                        continue;
                    res.push_back(i * 100 + j * 10 + k);
                }
                count[j]++;
            }
            count[i]++;
        }
        return res;
    }
};