class Solution {
public:
    int captureForts(vector<int>& forts) {
        int len = forts.size();
        int status = -2, ret = 0, idx = -1;
        for (int i = 0; i < len; i++) {
            if (forts[i] == 1 || forts[i] == -1) {
                if (status != -2 && status != forts[i]) {
                    ret = ret > i - idx - 1 ? ret : i - idx - 1;
                }
                status = forts[i];
                idx = i;
            }
        }
        return ret;
    }
};