class Solution {
public:
    int minNumberInRotateArray(vector<int> rotateArray) {
        int l = 0;
        int r = rotateArray.size() - 1;
        while (l <= r) {
            int mid = l + (r - l) / 2;
            if (rotateArray[mid] > rotateArray[r]) {
                l = mid + 1;
            } else if (rotateArray[mid] < rotateArray[r]) {
                r = mid;
            } else {
                r--;
            }
        }
        return rotateArray[l];
    }
};